Dr. Kertesz mentioned to me a case known to him of a farmer who had developed prosopagnosia and in consequence could no longer distinguish (the faces of) his cows, and of another such patient, an attendant in a Natural History Museum, who mistook his own reflection for the diorama of an ape

The Man Who Mistook His Wife For A Hat: And Other Clinical Tales (ed. Simon and Schuster, 1998) - ISBN: 9780684853949