I was innocently searching Google Images for dragons, when I stumbled across this amazing site. It’s stuffed full of scans of old images: paintings, drawings, book illustrations, illuminated pages, alchemical diagrams … Wow. But I’m a huge sucker for alchemical imagery, and a bunch of these pictures are in my copy of Roob’s Alchemy & Mysticism, which I just pulled out from my library shelves by total coincidence and leafed through for inspiration. (I have to write out a magic spell this evening. Needs inspiration.)
Alchemy & Mysticism is from Taschen Press. I respect Dover Books more, but Taschen is also worth respect.