We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
public domain illustration permissible?
I want to use paw prints in my ebook and print copy version. In both versions I will be documenting the internet source of the paw print images. Does this present a publishing delimma or is it permissible, since i am documenting the source of the image. My other option is to capture the cat and have the cat create the pawprints, which is too labor intensive for this project.