wearied limbs, and gave myself up to the luxury of repose." Probably most of the seventy-five or eighty copies of "Birds" which were taken by subscribers in this country are still extant, held by the great libraries, and learned institutions. The Lenox Library in New York owns three sets. The Astor Library owns one set. I have examined this work there; there are four volumes in a set; they are elephant folio size--more than three feet long, and two or more feet wide. They are the heaviest books I ever handled. It takes two men to carry one volume to the large racks which hold them for the purpose of examination. The birds, of which there are a thousand and fifty-five specimens in four hundred and thirty-five plates, are all life size, even the great eagles, and appear to be unfaded. This work, which cost the original subscribers one thousand dollars, now brings four thousand dollars at private sale. Of the edition with reduced figures and with the bird biographies, many more were sold, and all considerable public libraries in this country possess the work. It consists of seven imperial octavo volumes. Five hundred dollars is the average price which this work brings. This was a copy of the original English publication, with the figures reduced and lithographed. In this work, his sons, John and Victor, greatly assisted him, the former doing the reducing by the aid of the camera-lucida, and the latter attending to the printing and publishing. The first volume of this work appeared in 1840, and the last in 1844. Audubon experimented a long time before he hit upon a satisfactory method of drawing his birds. Early in his studies he merely drew them in outline. Then he practised using threads to raise the head, wing or tail of his specimen. Under David he had learned to draw the human figure from a manikin. It now occurred to him to make a manikin of a bird, using cork or wood, or wires for the purpose. But his bird manikin only excited the laughter and ridicule of his friends. Then he conceived the happy thought of setting up the body of the dead bird by the aid of wires, very much as a taxidermist mounts them. This plan worked well and enabled him to have his birds permanently before him in a characteristic attitude: "The bird fixed with wires on squares I studied as a lay figure before me, its nature previously known to me as far as habits went, and its general form having been perfectly observed."