Get Ready To Have Your Mind Blown

This is like a double forgotten bookmark. Color photo, 4 inches by 6 inches. Writing on reverse:
This photo was found in 'Ulysses' on top on of the hutch - Whose??

Found in (wait for it) "Textbook of Dental Radiology" by Olaf E. Langland. Charles C. Thomas Publisher, 1984.

So... Someone else found this photo in a book (Ulysses) and thought enough to note the occasion. There were no copies of Ulysses in this particular batch of books I was sorting, so this one will have to remain a mystery.