Well, I couldn't resist. I was in a rare bookstore in Salt Lake, and saw that they had both volumes of Johnson's Natural History: The Illustrated Animal Kingdom. Doesn't ring any bells? It's the book that inspired many an O'Reilly book cover with its etchings of many different animals, over 1500 of them. It was published back in 1880 or so, and is really quite amazing. I didn't have my scanner handy, but below is a duck image (forgive the poor quality, I snapped it with available room light using my Nikon 4500 handheld) that will give you some idea of the kind of thing that you can find.
I've got some ideas about things I can do with these books, and most of them involve making the text and artwork available online. Stay tuned, I'll keep you posted when I get some more of this worked out.