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.