To find images within books in BobCat go to the search box and click on advanced. Then enter the topic in the first box limited to Anywhere in the Record. In the second box enter either illus. (for illustrations) or Plates (for color plates) also Anywhere in the Record.
Researchers and designers often require a broad range of historical visual images. Below are some resources that serve as good starting places, though many of them are more focused on fine arts (rather than film stills and documentation).