In this and other instances, cut bones afford one of the most certain tests of the presence of man. The bones tell their own tale, and their geological age can be certainly identified. Sharp cuts could only be made on them while the bones were fresh, and the state of fossilization, and presence of dendrites or minute crystals alike on the side of the cuts and on the bone, negative any idea of forgery. The cuts can be compared with those on thousands of undoubted human cuts on bones from the reindeer and other later periods, and with cuts now made with old flint knives on fresh bones. All these tests have been applied by some of the best anthropologists of the day, who have made a special study of the subject, and who have shown their caution and good faith by rejecting numerous specimens which did not fully meet the most rigorous requirements, with the result that in several cases there could be no reasonable doubt that the cuts were really made by human implements guided by human hands. The only possible alternative suggested is, that they might have been made by gnawing animals or fishes. But as Quatrefages observes, even an ordinary carpenter would have no difficulty in distinguishing between a clean cut made by a sharp knife, and a groove cut by repeated strokes of a narrow chisel; and how much more would it be impossible for a Professor trained to scientific investigation, and armed with a microscope, to mistake a groove gnawed out by a shark or rodent for a cut made by a flint knife. No one who will refer to Quatrefages' Hommes fossilés, and look at the figures of cut bones given there from actual photographs, can feel any doubt that the cuts there delineated were made by flint knives held by the human hand.

In addition to this instance of St. Prest, Quatrefages in his Histoire des Races Humaines, published in 1887, and containing the latest summary of the evidence generally accepted by French geologists as to Tertiary man, says that, omitting doubtful cases, the presence of man has been signalized in deposits undoubtedly Tertiary in five different localities, viz. in France by the Abbé Bourgeois, in the Lower Miocene of Thenay near Pontlevoy (Loir-et-Cher); by M. Rames at Puy Courny near Aurillac (Cantal), in the Upper Miocene; in Italy by M. Capellini in the Pliocene of Monte Aperto near Sienna, and by M. Ragazzoni in the Lower Pliocene of Castelnedolo near Brescia; in Portugal by M. Ribiero at Otta, in the valley of the Tagus, in the Upper Miocene.

To these may be added the cut bones of Halitherium, a Miocene species, from Pouancé (Maine et Loire), by M. Delaunay; and those on the tibia of a Rhinoceros Etruscus, and other fossil bones from the Upper Pliocene of the Val d'Arno. In addition to these are the numerous remains, certainly human and presumably Tertiary, from North and South America, which will be referred to later, and a considerable number of cases where there is a good deal of primâ facie evidence for Tertiary human remains, but where doubts remain and their authenticity is still denied by competent authorities. Among these ought to be placed the instance from Portugal, for although a large celt very like those of the oldest palæolithic type was undoubtedly found in strata which had always been considered as Miocene, the Congress of Palæontologists who assembled at Lisbon were divided in opinion as to the conclusiveness of the evidence.

But there remain six cases in the Old World, ranging from St. Prest in the Upper Pliocene to Thenay in the Lower Miocene, in which the preponderance of evidence and authority in support of Tertiary man seems so decisive, that nothing but a preconceived bias against the antiquity of the human race can refuse to accept it.

I have already discussed this evidence so fully in a former work (Problems of the Future, ch. v. on Tertiary Man) that I do not propose to go over the ground again, but merely to refer briefly to some of the more important points which come out in the above six instances. In three of them, those of the Halitherium of Pouancé, the Balæonotus of Monte Aperto, and the rhinoceros of the Val d'Arno, the evidence depends entirely on cut bones, and in the case of St. Prest on that of cut bones of Elephas Meridionalis combined with palæolithic implements.

The evidence from cut bones is for the reasons already stated very conclusive, and when a jury of four or five of the leading authorities, such as Quatrefages, Hamy, Mortillet, and Delaunay, who have devoted themselves to this branch of inquiry, and have shown their great care and conscientiousness by rejecting numbers of cases which did not satisfy the most rigid tests, arrive unanimously at the conclusion that many of the cuts on the bones of Tertiary animals are unmistakably of human origin, there seems no room left for any reasonable scepticism. I cannot doubt therefore that we have positive evidence to confirm the existence of man, at any rate from the Pliocene period, through the long series of ages intervening between it and the Quaternary.

But the discovery of flint implements at Puy Courny in the Upper Miocene, and at Thenay in the Lower Miocene, carry us back a long step further, and involves such important issues as to the origin of the human race, that it may be well to recapitulate the evidence upon which those discoveries rest.

The first question is as to the geological age of the deposits in which these chipped implements have been found. In the case of Puy Courny this is beyond dispute. In the central region of the Auvergne there have been two series of volcanic eruptions, the latest towards the close of the Pliocene or commencement of the Quaternary period, and an older one, which, from its position and fossils, is clearly of the Upper Miocene. The gravels in which the chipped flints were discovered by M. Rames, a very competent geologist, were interstratified with tuffs and lavas of these older volcanoes, and no doubt as to their geological age was raised by the Congress of French archæologists to whom they were submitted. The whole question turns therefore on the sufficiency of the proofs of human origin, as to which the same Congress expressed themselves as fully satisfied.

The chipped flints from Puy Courny also afford another very conclusive proof of intelligent design. The gravelly deposit in which they are found contains five different varieties of flints, and of these all that look like human implements are confined to one particular variety, which from its nature is peculiarly adapted for human use. As Quatrefages says, no torrents or other natural causes could have exercised such a discrimination, which could only have been made by an intelligent being, selecting the stones best adapted for his tools and weapons.

UPPER MIOCENE IMPLEMENTS. PUY COURNY.

The general reader must be content to rely to a great extent on the verdict of experts, and in this instance of Puy Courny need not perhaps go further than the conclusion of the French Congress of archæologists, who pronounced in favour both of their Miocene and human origin. It may be well, however, to annex a plate showing in two instances how closely the specimens from Puy Courny resemble those of later periods, of the human origin of which no doubt has ever been entertained. It is certainly carrying scientific scepticism to an unreasonable pitch to doubt that whatever cause fashioned the two lower figures, the same cause must equally have fashioned the upper ones; and if that cause be human intelligence in the Quaternary period it must have been human or human-like intelligence in the Upper Miocene.

COPARE QUATERNARY IMPLEMENTS.

It would seem that there could be little doubt as to the geological position of the strata from which the alleged chipped flints come. The Faluns are a well-known marine deposit of a shallow sea spread over a great part of Central and Southern France, and identified, beyond a doubt, as Upper Miocene by its shells. The Orleans Sands are another Miocene deposit perfectly characterized by its mammalian fauna, in which the Mastodon Angustidens first appears, with other peculiar species. The Calcaire de Beauce is a solid freshwater limestone formed in the great lake which in the Miocene age occupied the plain of the Beauce and extended into Touraine. It forms a clear horizon or dividing line between the Upper Miocene, characterized by the Mastodon, and the Lower Miocene, of which the Acrotherium, a four-toed and hornless rhinoceros, is the most characteristic fossil.

The supposed chipped flints are said to appear sparingly in the upper deposits, disappear in the Calcaire de Beauce, and reappear, at first sparingly and then plentifully, in the lacustrian marls below the limestone. They are by far the most numerous in a thin layer of greenish-yellow clay, No. 3 of section, below which they rapidly disappear. There can be no question therefore that if the flints really came from the alleged deposits, and really show the work of human hands, the savages by whom they were chipped must have lived on the shores or sand-banks of this Miocene lake. As regards the geological question, it is right to observe that Professor Prestwich, who visited the section a good many years ago in company with the Abbé Bourgeois, and who is one of the highest authorities on this class of questions, remained unconvinced that the flints shown him really came from the alleged strata below the Calcaire de Beauce, and thought that the specimens which appeared to show human manufacture might have come from the surface, and become intermixed with the natural flints of the lower strata.

The geological horizon, however, seems to have been generally accepted by French and Continental geologists, especially by the latest authorities, and the doubts which have been expressed have turned mainly on the proof of human design shown by the implements. This is a question which must be decided by the authority of experts, for it requires special experience to be able to distinguish between accidental fractures and human design, in implements of the extremely rude type of the earlier formations. The test is mainly afforded by the nature of the chipping. If it consists of a number of small chips, all in the same direction, with the result of bringing one face or side into a definite form, adapted for some special use, the inference is strong that the chips were the work of design. The general form might be the result of accident, but fractures from frost or collisions simulating chipping could hardly be all in the same direction, and confined to one part of the stone. The inference is strengthened if the specimen shows bulbs of percussion, where the blows had been struck to fashion the implement, and if the microscope discloses parallel striæ and other signs of use on the chipped edge, such as would be made by scraping bones or skins, while nothing of the sort is seen on the other natural edges, though they may be sharper. But above all, the surest test is afforded by a comparison with other implements of later dates, or even of existing savages, which are beyond all doubts products of human manufacture.

Tried by these tests, the evidence stands as follows—

When specimens of the flints from Thenay were first submitted to the Anthropological Congress at Brussels, in 1867, their human origin was admitted by MM. Worsae, de Vibraye, de Mortillet, and Schmidt, and rejected by MM. Nilson, Hebert, and others, while M. Quatrefages reserved his opinion, thinking a strong case made out, but not being entirely satisfied. M. Bourgeois himself was partly responsible for these doubts, for, like Boucher-de-Perthes, he had injured his case by overstating it, and including a number of small flints, which might have been, and probably were, merely natural specimens. But the whole collection having been transferred to the Archæological Museum at St. Germain, its director, M. Mortillet, selected those which appeared most demonstrative of human origin, and placed them in a glass case, side by side with similar types of undoubted Quaternary implements. This removed a great many doubts, and later discoveries of still better specimens of the type of scrapers have, in the words of Quatrefages, "dispelled his last doubts," while not a single instance has occurred of any convert in the opposite direction, or of any opponent who has adduced facts contradicting the conclusions of Quatrefages, Mortillet, and Hamy, after an equally careful and minute investigation.

MIDDLE MIOCENE IMPLEMENTS.

These figures seem to leave no reasonable doubt that some at least of the flints from Thenay show unmistakable signs of human handiwork, and I only hesitate to accept them as conclusive proofs of the existence of man in the Middle Miocene, because such an authority as Prestwich retains doubts of their having come from the geological horizon accepted by the most eminent modern French geologists.

MIDDLE MIOCENE IMPLEMENTS.

The evidence of the authenticity of these implements from Thenay is, moreover, greatly strengthened by the discovery of other Miocene implements at Puy Courny, which have not been seriously impugned, and by the essay of Professor Prestwich, confirming the discovery of numerous flint implements in the upper level gravels of the North Downs, which could only have been deposited by streams flowing from a mountain ridge along the Anticlinal of the Weald, of which 2000 feet must have disappeared by sub-aërial denudation since these rivers flowed northwards from its flanks. How far back such a denudation may carry us is a matter of speculation. Certainly, as Prestwich admits, into the pre-glacial or very early glacial ages, and possibly into the Tertiaries, but at any rate for a time which, by whatever name we call it, must be enormous according to any standard of centuries or millenniums. And what is specially interesting in these extremely ancient implements is that, in Prestwich's words, "these plateau implements exhibit distinct characters and types such as would denote them to be the work of a more primitive and ruder race than those fabricated by palæolithic men of the valley drift times."

COMPARE QUATERNARY IMPLEMENTS.

In fact we have only to look at the figures which accompany Prestwich's essay,[12] to see that their types resemble those of Puy Courny and Thenay, rather than those of St. Acheul and Moustier.

The following remarks of the Professor would apply almost as well to the Miocene implements as to those of the plateau—

"Unlike the valley implements, the plateau implements are, as a rule, made of the fragments of natural drift flints, that are found scattered over the surface of the ground, or picked up in gravel-beds and merely roughly trimmed. Sometimes the work is so slight as to be scarcely apparent; at others, it is sufficient to show a distinct design and object. It indicates the very infancy of the art, and probably the earliest efforts of man to fabricate his tools and weapons from other substances than wood or bone. That there was an object and design is manifest from the fact that they admit of being grouped according to certain patterns. These are very simple, but they answered to the wants of a primitive people.

"With few exceptions, the implements are small, from 2 to 5 inches in length, and mostly such as could have been used in the hand, and in the hand only. There is, with the exceptions before named, an almost entire absence of the large massive spear-head forms of the valley drifts, and a large preponderance of forms adapted for chipping, hammering, and scraping. With these are some implements that could not have been used in the hand, but they are few and rude. The difference between the plateau and the valley implements is as great or greater than between the latter and the neolithic implements. Though the work on the plateau implements is often so slight as scarcely to be recognizable, even modern savage work, such as exhibited for example by the stone implements of the Australian natives, show, when divested of their mounting, an amount of work no greater or more distinct, than do these early palæolithic specimens.

"Some persons may be disposed to look upon the slight and rude work which these flints have received as the result only of the abrasion and knocking about caused by collision during the transport of the drift. This belief prevailed for a time even in the case of the comparatively well-fashioned valley implements. A little practice, and comparison with natural drift flints, will show the difference, notwithstanding the, at first, unpromising appearance of these early specimens of man's handicraft. It is as such, and from their being the earliest such work with which we are acquainted, that they are of so great interest, for they give us some slight insight into the occupation and surroundings of the race by whom they were used. A main object their owners would seem to have had in view, was the trimming of flints to supply them with implements adapted to the breaking of bones for the sake of the marrow, scraping skins, and round bodies such as bones or sticks, for use as simple tools or poles. From the scarcity of the large massive implements of the pointed and adze type, so common in the valley drifts, it would seem as though offensive and defensive weapons of this class had not been so much needed, whether from the rarity of the large mammalia, so common later on in the low-level valley drifts, or from the habits and character of those early people."

The positive evidence is therefore extremely strong that men existed in the Tertiaries, and if we add to it the irresistible inference that he must have done so to develop so many different races, and leave his rude implements in so many and such remote regions as we found early in the Quaternary, I do not see how it is possible to avoid accepting it as an established fact.

But in using the term Tertiary Man, I do not venture to define the exact meaning of "man," or the precise stage in his evolution which had been attained at this enormously remote period. M. Gaudry, an excellent authority, while admitting that the flints from Thenay showed evidence of intentional chipping, thought that they might have been the work of the Dryopithecus, a fossil ape, supposed to be nearer man than any existing anthropoid, whose remains had been found at Sausan in the Middle Miocene. But the Dryopithecus has been deposed from his pride of place by the subsequent discovery of a more perfect jaw, and he is now considered, though undoubtedly an anthropoid ape, to be of a lower type than the chimpanzee or gorilla.[13] The strongest argument however for the essentially human character of the artificers of the flints of Thenay and Puy Courny is that their type continues, with no change except that of slight successive improvements, through the Pliocene, Quaternary, and even down to the present day. The scraper of the Esquimaux and the Andaman islanders is but an enlarged and improved edition of the Miocene scraper, and in the latter case the stones seem to have been split by the same agency, viz. that of fire. The early knowledge of fire is also confirmed by the discovery, reported by M. Bourgeois in the Orleans Sand at Thenay, with bones of mastodon and dinotherium, of a stony fragment mixed with carbon, in a sort of hardened paste, which, as we can hardly suppose pottery to have been known, must be the remnant of a hearth on which there had been a fire.

There must always, however, remain a doubt as to the nature of this ancestral Tertiary man, until actual skulls and skeletons have been found, under circumstances which preclude doubt, and in sufficient numbers to enable anthropologists to speak with the same confidence as to types and races, as they can of his Quaternary successors. This again is difficult from the rarity of such remains, and from the fact that after burial of the dead was introduced, graves must often have been dug down from the surface into older strata, with which in course of time their contents become intermixed. No case, therefore, can be safely admitted where the find was not made by well-known scientific authorities, under circumstances which preclude the possibility of subsequent interment, and vouch for the geological age of the undisturbed deposit. This test disposes of all the alleged discoveries of human remains in the Tertiaries of the Old World, except one, and although it is quite possible that some may be genuine among those rejected, it is safer not to rely on them. There is one, however, which is supported by extremely strong evidence, and the discussion of which I have reserved for the last, as if accepted it throws a new and unexpected light on the evolution of the human race.

The following is the account of it, taken from Quatrefages' Races humaines—

"The bones of four individuals, a woman and two children, were found at Castelnedolo, near Brescia, in a bed identified by its fossils as Lower Pliocene. The excavations were made with the utmost care, in undisturbed strata, by M. Ragazzoni, a well-known scientific man, assisted by M. Germani, and the results confirmed by M. Sergi, a well-known geologist, after a minute personal investigation. The deposit was removed in successive horizontal layers, and not the least trace was found of the beds having been mixed or disturbed. The human bones presented the same fossilized appearance as those of the extinct animals in the same deposit. The female skeleton was almost entire, and the fragments of the skull were sufficiently perfect to admit of their being pieced together so as to show almost its entire form."

The first conjecture naturally was that it must have been a case of subsequent interment, a conjecture which was strengthened by the fact of the female skeleton being so entire; but this is negatived by the undisturbed nature of the beds, and by the fact that the other bones were found scattered at considerable distances throughout the stratum. M. Quatrefages sums up the evidence by saying, "that there exists no serious reason for doubting the discovery, and that if made in a Quaternary deposit, no one would have thought of contesting its accuracy. Nothing can be opposed to it but theoretical à priori objections similar to those which so long repelled the existence of Quaternary man."

But if we accept this discovery, it leads to the remarkable conclusion that Tertiary man not only existed, but has undergone little change in the thousands of centuries which have since elapsed. The skull is of fair capacity, very much like what might be expected from a female of the Canstadt type, and less rude and ape-like than the skulls of Spy and Neanderthal, or those of modern Bushmen and Australians. And the other bones of the skeleton show no marked peculiarities.

This makes it difficult to accept the discovery unreservedly, notwithstanding the great weight of positive evidence in its favour. The great objection to Tertiary man has been, that as all other species had changed, and many had become extinct two or three times over since the Miocene, it was unlikely that an animal so highly specialized as man should alone have had a continuous existence. And this argument of course becomes stronger the more it can be shown that the oldest skeletons differed little if it at all from man of the Quaternary and Recent ages. Moreover, the earlier specimens of Quaternary man which are so numerous and authentic, show, if not anything that can be fairly called the "missing link," still a decided tendency, as they get older, towards the type of the rudest existing races, which again show a distinct though distant approximation towards the type of the higher apes. The oldest Quaternary skulls are dolichocephalic, very thick with enormous frontal sinuses; low and receding foreheads; flattened vertices; prognathous jaws, and slight and receding' chins. The average cranial capacity is about 1150 cubic centimètres, or fully one-fourth less than that of modern European man, and of this smaller brain a larger proportion is in the posterior region. The other peculiarities of the skeletons all tend in the same direction, and, as we have seen in Huxley's description of the men of Spy, sometimes go a long way in the pithecoid direction, even to the extent of not being able to straighten the knee in walking.

It would, therefore, be contrary to all our ideas of evolution to find that some 100,000 or 200,000, or more probably 400,000 or 500,000 years prior to these men of Spy and Neanderthal, the human race had existed in higher physical perfection nearer to the existing type of modern man.

Quatrefages meets this by saying that Tertiary men with a larger brain, and therefore more intelligence than the other Tertiary mammals, might have survived, where these succumbed to changes and became extinct. This is doubtless true to some extent, but it hardly seems sufficient to account for the presence of a higher and more recent type, like that of Castelnedolo in the Lower Pliocene, that is a whole geological period earlier than that of the Lower Quaternary. It is more to the purpose to say with Gaudry that the changes on which the distinction of species are founded are often so slight that they might just as well be attributed to variations of races; and to appeal to instances like that of the Hylobates of the Miocene, one of the nearest congeners of man, in which no genuine difference can be detected from the Hylobates or Gibbon of the present day; and if the discovery referred to at p. 264, of anthropoid primates in the Eocene of Patagonia, should be confirmed, it would greatly strengthen the argument for the persistence of the order to which man belongs through several geological periods.

In any case we require more than the evidence of this one discovery before we can assume the type of Tertiary man as a proved fact with the same confidence as we can the existence of something like man in those remote ages, from the repeated evidence of chipped stones and cut bones, showing unmistakable signs of being the work of human intelligence. And in the meantime, the only safe conclusion seems to be that it is very probable that we may have to go back to the Eocene to find the "missing link," or the ancestral animal which may have been the common progenitor of man and of the other quadrumana.

I turn now to the evidence from the New World. I have kept this distinct, for there is no such proof of synchronism between the later geological phases of this and of the Old World as would warrant us in assuming that what is true in one is necessarily true in the other. Thus in Europe the presence of the mastodon is a conclusive proof that the formation in which its remains are found is Upper Miocene or Pliocene, and it has completely disappeared before the glacial period and the Quaternary era. But in North America it has survived both these periods, and it is even a question whether it is not found in recent peat-mosses with arrow-heads of the historical Indians.

The glacial period also, which in the Old World affords such a clear demarcation between Tertiary and Recent ages, and such manifest proofs of two great glaciations with a long inter-glacial period, presents different conditions in America, where the ice-caps radiated from different centres, and extended further south and over wider areas. There is no proof whether the great cold set in sooner or later, and whether the elevations and depressions of land synchronized with those of Europe. The evidence for a long inter-glacial period is by no means so clear, and the best American geologists differ respecting it. And above all, the glacial period seems to have lasted longer, and the time required for post-glacial or recent denudation, and erosion of river-gorges, to be less than is required to account for post-glacial phenomena on this side of the Atlantic.

The evidence, therefore, from the New World, though conclusive as to the existence of man from an immense antiquity, can hardly be accepted as equally so in an attempt to prove that antiquity to be Tertiary in the sense of identifying it with specific European formations. With this reservation I proceed to give a short account of this evidence as bearing on the question of the oldest proofs of man's existence. The first step or proof of the presence of man in the Quaternary deposits which correspond with the oldest river-drifts of Europe, has only been made quite recently. Mr. Abbott was the first to discover such implements of the usual palæolithic type in Quaternary gravels of the river Delaware, near Trenton in New Jersey, and since then they have been frequently found, as described by Dr. Wright in his recently-published Ice Age in America, in Ohio, Illinois, and other States, in the old gravels of rivers which carried the drainage of the great lake district to the Hudson and the Mississippi, before the present line of drainage was established by the Falls of Niagara and the St. Lawrence. So far the evidence merely confirms that drawn from similar finds in the Old World of the existence of man in the early glacial or Quaternary times, already widely diffused, and everywhere in a similar condition of primitive savagery, and chipping his rude stone implements into the same forms. But if we cross the Rocky Mountains into California, we find evidence which apparently carries us further back and raises new questions.

The whole region west of the Rocky Mountains is comparatively recent. The Coast Range which now fronts the Pacific is composed entirely of marine Tertiary strata, and when they were deposited, the waves of the Pacific beat against the flanks of the Sierra Nevada. At length the Coast Range was upheaved and a wide valley left between it and the Sierra of over 400 miles in length, and with an average breadth of seventy-five miles. The Sierra itself is old land, the lower hills consisting of Triassic slates and the higher ranges of granite, and it has never been under water since the Secondary Age though doubtless it stood much higher before it was so greatly denuded. All along its western flank and far down into the great valley is an enormous bed of auriferous gravel, doubtless derived from the waste of the rocks of the Sierra during an immense time by old rivers now buried under their own deposits. While these deposits were going on a great outburst of volcanoes occurred on the western slope of the Sierra, and successive sheets of tuffs, ashes, and lavas are interstratified with the gravels, while finally an immense flow of basalt covered up everything. The country then presented the appearance of a great plain, sloping gradually downwards from the Sierra according to the flow of the basalt and lavas. This plain was in its turn attacked by denudation and worn down by the existing main rivers into valleys and gorges, and by their tributary streams into a series of flat-topped hills, capped by basalt and divided from one another by deep and narrow cañons.

The immense time required for this latest erosion may be inferred when it is stated that where the Columbia river cuts through the axis of the Cascade Mountains, the precipitous rocks on either side, to a height of from 3000 to 4000 feet, consist of this late Tertiary or Post-Tertiary basalt, and that the Deschutes river has been cut into the great basaltic plain for 140 miles to a depth of from 1000 to 2500 feet, without reaching the bottom of the lava. The American and Yuba valleys have been lowered from 800 to 1500 feet, and the gorge of the Stanislas river has cut through one of these basalt-covered hills to the depth of 1500 feet.

Evidently the gravels which lie below the basalt, and interstratified with the tuffs and lavas, or below them, and which belong to an older and still more extensive denudation, must be of immense antiquity, an antiquity which remains the same whether we call it Quaternary or Tertiary. It is in these gravels that gold is found, and in the search for it great masses have been removed in which numerous stone implements have been found.

The great antiquity of those gravels and volcanic tuffs is further confirmed by the changes in the flora and fauna which are proved to have occurred. The animal remains found beneath the basaltic cap are very numerous, and all of extinct species. They belong to the genera rhinoceros, elatherium, felis, canis, bos, tapirus, hipparion, elephas (primigenius), mastodon, and auchenia, and form an assemblage entirely distinct from any now living in any part of North America. Some of the genera survived into the Quaternary age as in Europe, but many, both of the genera and species, are among those most characteristic of the Pliocene period.

The flora also, which is well preserved in the white clays formed from the volcanic ash, comprises forty-nine species of deciduous trees and shrubs, all distinct from those now living, without a single trace of the pines, firs, and other conifera which are now the prevalent trees throughout California.

Tried by any test, therefore, of fauna, flora, and of immensely long deposit before the present drainage and configuration of the country had begun to be established, Professor Whitney's contention that the auriferous gravels are of Tertiary origin seems to be fully established. It can only be met by obliterating all definite distinction between the Quaternary and the Pliocene, and adding to the former all the time subtracted from the latter. And even if we apply this to the physical changes, it would upset all our standards of geological formations characterized by fossils, to suppose that a fauna comprising the elatherium, hipparion, and auchenia could be properly transferred to the Quaternary. In fact no one would have thought of doing so if human implements and remains had not been found in them.

The discovery of such implements was first reported in 1862, and since then a large number have been found, but their authenticity has been hotly contested. The most common were stone mortars very like those of the Indians of the present day, only ruder, and it was objected, first, that they were ground and not chipped, and therefore belonged to the neolithic age; secondly, that they might have slipped down from the surface or been taken down by miners. The difficulty in meeting these objections was that the implements had been found not by scientific men in situ, but by ignorant miners, who were too keen in the pursuit of gold to notice the particulars of the find, and only knew that they had picked them out in sorting loads of the gravels, and generally thrown them aside. This, however, had occurred in such a number of instances, over such wide areas, and with such a total absence of any motive on the part of the miners to misrepresent or commit a fraud, that the cumulative evidence became almost irresistible; and we cannot sum it up better than in the words of the latest and best authority, Professor Wright, in an article in the Century of April 1891, which is the more important because only two years previously, in his Ice Age in North America, he had still expressed himself as retaining doubts.

He says, "But so many of such discoveries have been reported as to make it altogether improbable that the miners were in every case mistaken; and we must conclude that rude stone implements do actually occur in connection with the bones of various extinct animals in the undisturbed strata of the gold-bearing gravel."

Fortunately the most important human remains have been found in what may be considered as a test case, where it was physically impossible that they could have been introduced by accident, and where the evidence of a common workman as to the locality of the find is as good as that of a professed geologist.

During the deposition of the auriferous gravel on the western flanks of the Sierra there were great outbursts of volcanoes near the summits of that range. Towards their close a vast stream of lava flowed down the shallow valley of the ancient Stanislas river, filling up its channel for forty miles or more, and covering its extensive gravel deposits. The modern Stanislas river has cut across its former bed, and now flows in a gorge from 1200 to 2000 feet deeper than the old valley which was filled up by the lava stream, the surface of which appears as a long flat-topped ridge, known as Table Mountain. In many places the sides of the valley which originally directed the course of the lava have been worn away, so that the walls on either side present a perpendicular face one hundred feet or more in height.

The gravel of the ancient Stanislas river being very auriferous, great efforts have been made to reach the portion of it which lies under Table Mountain. Large sums have been spent in sinking shafts from the top through the lava cap, and tunnelling into it from the sides. Great masses of gravel have been thus quarried and removed, and a considerable amount of gold obtained, though in most cases not enough to meet the expenses, and the workings have been mostly discontinued.

It is evident that objects brought from a great depth below this lava cap must have remained there undisturbed since they were deposited along with the gravels, and that the evidence of the simplest miner, who says he brought them with a truck-load of dirt from the bottoms of shafts, or ends of tunnels pierced for hundreds of feet through the solid lava, is, if he speaks the truth, as good as if a scientist had found them in situ. And this evidence, together with that of mining inspectors and respectable residents who took an interest in scientific subjects, has been forthcoming in such a large number of instances as to preclude any supposition of mistake or fraud. Three of the latest of these discoveries were reported at the meeting of the Geological Society of America on the 30th December, 1890, and they seem to be supported by very first-class evidence.[14] Mr. Becker, one of the staff of the United States Geological Survey, to whom has been, committed the responsible work of reporting upon the gold-bearing gravels of California, exhibited to the Society a stone mortar, and some arrow or spear-heads, with the sworn statement from Mr. Neale, a well-known mining superintendent, that he took them with his own hands from undisturbed gravel in a mine of which he had charge under the lava of Table Mountain.

A second object exhibited was a pestle found by Mr. King, who was at one time General Director of the United States Geological Survey, and is an expert whose judgment on such matters should be final, and who had no doubt that the gravel in which he found the object must have lain in place ever since the lava came down and covered it. The third object was a mortar taken from the old gravel at the end of a tunnel driven diagonally 175 feet from the western edge of the basalt cliff, and 100 feet or more below the surface of the flat top of Table Mountain, as supported by evidence entirely satisfactory to Professor Wright, who had just visited the locality and cross-examined the principal witnesses. This may prepare us to consider the case of the celebrated Calaveras skull as by no means an isolated or exceptional one, but antecedently probable from the number of human implements found in the same gravels, under the same beds of basalt and lava, at Table Mountain and numerous other places.

Professor Wright in the article already referred to, which is the latest on the subject, and made after his visit to California in 1890, which he says enabled him to add some important evidence, sums up the facts as follows—

"In February 1866, Mr. Mattenson, a blacksmith living near Table Mountain, in the county Calaveras, employed his spare earnings in driving a tunnel under the portion of the Sierra lava flow known as Bald Hill. At a depth of 150 feet below the surface, of which 100 feet consisted of solid lava, and the last fifty of interstratified beds of lava, gravel, and volcanic tuffs, he came upon petrified wood, and an object which he at first took for the root of a tree, thickly encased in cemented gravel. But seeing what he took for one of the roots was a lower jaw, he took the mass to the surface, and gave it to Mr. Scribner, the agent of an express company, and still living in the neighbourhood, and highly respected. Mr. Scribner, on perceiving what it was, sent it to Dr. Jones, a medical gentleman of the highest reputation, now living at San Francisco, who gave it to Professor Whitney, who visited the spot, and after a careful inquiry was fully satisfied with the evidence. Soon afterwards Professor Whitney took the skull home with him to Cambridge, where, in conjunction with Dr. Wynam, he subjected it to a very careful investigation to see if the relic itself confirmed the story told by the discoverer, and this it did to such a degree that, to use Professor Wright's words, the circumstantial evidence alone places its genuineness beyond all reasonable question."

This is not a solitary instance, for the Professor reports as the result of his personal inquiries only a year ago in the district, that "the evidence that human implements and fragments of the human skeleton have been found in the stratum of gravel underneath the lava of Table Mountain seems to be abundantly sufficient;" among others a fragment of a skull which came up with a bucketful of dirt from 180 feet below the surface of Table Mountain at Tuolumne.

Dr. Wallace, in an article on the "Antiquity of Man in North America," in the Nineteenth Century of November 1887, thus enumerates some of the principal instances—

"In Tuolumne county from 1862 to 1865 stone mortars and platters were found in the auriferous gravel along with bones and teeth of mastodon 90 feet below the surface, and a stone muller was obtained in a tunnel driven under Table Mountain. In 1870 a stone mortar was found at a depth of 60 feet in gravel under clay and 'cement,' as the hard clay with vegetable remains (the old volcanic ash) is called by the miners. In Calaveras county from 1860 to 1869 many mortars and other stone implements were found in the gravels under lava beds, and in other auriferous gravels and clays at a depth of 150 feet. In Amador county stone mortars have been found in similar gravel at a depth of 40 feet. In Placer county stone platters and dishes have been found in auriferous gravels from 10 to 20 feet below the surface. In Nevada county stone mortars and ground discs have been found from 15 to 30 feet deep in the gravel. In Butte county similar mortars and pestles have been found in the lower gravel beneath lava beds and auriferous gravel; and many other similar finds have been recorded....

"Even these Californian remains do not exhaust the proofs of man's great antiquity in America, since we have the record of another discovery which indicates that he may, possibly, have existed at an even more remote epoch. Mr. E. L. Berthoud has described the finding of stone implements of a rude type in the Tertiary gravels of the Crow Creek, Colorado. Some shells were obtained from the same gravels, which were determined by Mr. T. A. Conrad to be species which are 'certainly not older than Older Pliocene, or possibly Miocene.'"

I do not dwell on the discoveries which have been made of human implements and skeletons in the cases of Minas Geraes in Brazil, and in the drift or loess of the pampas of Buenos Ayres, for although associated with extinct animals usually considered as Pliocene, there is a difference of opinion among competent geologists, whether the deposits are really Tertiary or only early Quaternary.

There is, however, one discovery, made since the date of these above recorded, of human work below the great basalt cap of North-Western America, brought up from a great depth of underlying gravels and sands of a silted-up lake, formerly forming part of the course of the Snake river at Nampa in Idaho, which is as startling in its way as that of the Calaveras skull. The following account of it is given on the authority of Professor Wright, who, having visited the locality in the summer of 1890, states that he found "abundant confirmatory evidence"—

The Nampa image was brought up in boring an Artesian well, at Nampa in Ada county, Idaho, through a lava-cap 15 feet thick, and below it about 200 feet of the quicksands and clays of a silted-up lake, formed in a basin of the Snake river, which joins the Columbia river, and flows into the Pacific, forming part, therefore, of the same geographical and drainage system as the Californian gravels. At this depth the borers came down to a stratum of coarse sand, mixed with clay balls at the top, and resting at the bottom on an ancient vegetable soil, and the image came up from the lower part of this coarse sand. The borer, or liner of the well, was a six-inch iron tube, and the drill was only used in piercing the lava, while the sands below it were all extracted by a sand pump. Mr. King, a respectable citizen of Nampa, who was boring the well, states that he had been for several days closely watching the progress of the well and passing through his hands the contents of the sand pump as they were brought up, so that he had hold of the image before he suspected what it was. Mr. Cumming, superintendent of that portion of the Union Pacific Railway, a highly-trained graduate of Harvard College, was on the ground next day and saw the image, and heard Mr. King's account of the discovery, and Mr. Adams, the president of the railway, happening to pass that way about a month later, he brought it to the notice of some of the foremost geologists in the United States. The image was sent to Boston by Mr. King, who gave every information, and it was found to be modelled from stiff clay, like that of the clay balls found in the sand, slightly if at all touched by fire, and incrusted like those balls with grains of oxide of iron, which Professor Putnam considers to be a conclusive proof of its great antiquity. Mr. Emmons, of the State Geological Society, gives it as his opinion that the strata in which this image is said to have been found, is older by far than any others in which human remains have been discovered, unless it be those under Table Mountain, in California, from which came the celebrated Calaveras skull. So much for the authenticity of the discovery, which seems unassailable, but now comes the remarkable feature of it, which to a great extent revolutionizes our conception of this early palæolithic age. The image, or rather statuette, which is scarcely an inch and a half long, is by no means a rude object, but on the contrary more artistic, and a better representation of the human form, than the little idols of many comparatively modern and civilized people, such as the Phœnicians. It is in fact very like the little statuettes so abundantly found in the neighbourhood of the old temple-pyramids of Mexico, which are generally believed to be not much older than the date of the Spanish Conquest.