Fistulas, too, insidiously attack all parts of the body, owing to unskilfulness on the part of medical men in the use of the knife. The smaller centaury1440 is used for their cure, with the addition of lotions1441 and boiled honey: juice of plantago1442 is also employed, as an injection; cinquefoil, mixed with salt and honey; ladanum,1443 combined with castoreum;1444 cotyledon,1445 applied hot with stag’s marrow; pith of the root of verbascum1446 reduced to a liquid state in the shape of a lotion, and injected; root of aristolochia;1447 or juice of tithymalos.1448