Need a dose of inspiration? Check out the Henry Wellcome Collection of Images:
"Wellcome Images is one of the world's richest and most unique collections, with themes ranging from medical and social history to contemporary healthcare and biomedical science. All our images are available on demand in digital form. Search online or use the expertise of our professional scientific and historical researchers. Whether it's medicine or magic, the sacred or the profane, science or satire - you'll find more than you expect. This unrivalled collection contains historical images from the Wellcome Library collections, Tibetan Buddhist paintings, ancient Sanskrit manuscripts written on palm leaves, beautifully illuminated Persian books and much more."
Here's a cute lil' witch holding a flower in one hand and a fan in the other. There's a whole section dedicated to witches alone!