Dover's got a huge collection of paperbacks that are collections of old pencil drawings showing all sorts of ornament. I think that many of them were copied from wood carvings as well as old engravings in wood and metal. My favorite is "Florid Victorian Ornament" by Karl Klimsch. here's a link to that specific title:
http://store.doverpublications.com/0486234908.html
If you type in "ornament" in Dover's search window you'll get a huge selection of different types of historical ornamentation. Don't stop there though, they've got some good, inexpensive reference books in their art section on anatomy. Just a great pictorial resource.
Michael E.