Adam and Eve; standing on either side of the tree of knowledge with the serpent, and in the foreground a cat, an elk, an ox, a hare, a parrot, a mouse; unfinished trial proof with the figures of the ox and hare in outline only and the cat missing. This is a rare impression of a proof taken while Dürer was working on his plate Adam and Eve, cat. no. 87 He engraved most of the wooded background of the composition first, and left the figures to which the majority of the preparatory studies are related, and the background on the right until last. It shows the way in which engravings are built up section by section rather than in horizontal layers, because the design of an engraving is defined by areas of cross-hatching. A second trial proof, in which Adam's left leg is completed is in the Albertina, Vienna. (http://www.britishmuseum.org/research/collection_online/collection_object_details.aspx?objectId=764498&partId=1&searchText=durer+adam+and+eve&people=127877&page=1)