The present work is in reality the outcome of what was first undertaken as a holiday recreation in the summer of 1903. While engaged upon a research of quite a different character, I reread, with greater care, Audubon's _Ornithological Biography_, and after turning the leaves of his extraordinary illustrations, it seemed to me most strange that but little should be known of the making of so original and masterful a character. As I was in England at the time some investigations were undertaken in London, but, as might have been expected, with rather barren results. After my return to America in the following year the search was continued, but as it proved equally fruitless here, the subject was set aside. Not until 1913, when this investigation was resumed in France, did I meet with success. Every man, however poor or inconsequential he may appear or be, is supposed to possess an estate, and every man of affairs is almost certain to leave behind him domestic, professional, or commercial papers, which are, in some degree, a mark of his attainments and an indication of his character and tastes. In the summer of 1913 I went to France in search of the personal records of the naturalist's father, Lieutenant Jean Audubon, whose home had been at Nantes and in the little commune of Couëron, nine miles below that city, on the right bank of the Loire. The part which Lieutenant Audubon played in the French Revolution was fully revealed in his letters, his reports to the Central Committee, and numerous other documents which are preserved in the archives of the Préfecture at Nantes; while complete records of his naval career both in the merchant marine and governmental service (_service pour l'État_) were subsequently obtained at Paris; but at Nantes his name had all but vanished, and little could be learned of his immediate family, which had been nearly extinct in France for over thirty years. Again the quest seemed likely to prove futile until a letter, which I received through the kindness of Mr. Louis Goldschmidt, then American Consul at Nantes, to M. Giraud Gangie, _conservateur_ of the public library in that city, brought a response, under date of December 29, 1913, informing me that two years before that time, he had met by chance in the streets of Couëron a retired notary who assured him that he held in possession numerous exact records of Jean Audubon and his family. The sage Henry Thoreau once remarked that you might search long and diligently for a rare bird, and then of a sudden surprise the whole family at dinner. So it happened in this case, and since these manuscript records, sought by many in vain on this side of the Atlantic, are so important for this history, the reader is entitled to an account of them.