Sotheby auction of Audubon's 'Birds of America'

The book, in the 'double elephant folio' size of 97 x 65cm, portrays all the birds life-size and is estimated to fetch 4 to 6 million pounds ($6,271,558 to 9,407,337) in the sale of 'Magnificent Books, Manuscripts and Drawings' on Dec. 7. See more on this story here.