The Fortunate Foundlings / Being the Genuine History of Colonel M——Rs, and His Sister, Madam Du P——Y, the Issue of the Hon. Ch——Es M——Rs, Son of the Late Duke of R—— L——D. Containing Many Wonderful Accidents That Befel Them in Their Travels, and Interspersed with the Characters and Adventures of Several Persons of Condition, In the Most Polite Courts of Europe. the Whole Calculated for the Entertainment and Improvement of the Youth of Both Sexes.

The narrative follows two foundling siblings raised by a benevolent gentleman who are later separated and pursue divergent lives: one enters military service and endures battles, capture, and harsh imprisonment while negotiating romantic entanglements; the other travels through fashionable Europe, encountering intrigues, an attempted assault, and a devoted suitor whose interventions repeatedly rescue her. Interwoven episodes depict masquerades, courtly rivalry, clandestine schemes, sudden reversals of fortune, and eventual discoveries of parentage that resolve estrangements. The work consistently frames these events to promote virtue, providential deliverance, and moral improvement through examples of constancy, generosity, and social reform.