I finally got my copy, Beebe’s copy, of his book Our Search for a Wilderness, with his bookplate. The seller thought it was an iguana, but I knew it was a sketch of a possible “pre-Archaeopteryx” avian ancestor he had imagined. In 1910.
I think it was 2003 when they dug up Microraptor gui. The model is light- colored, but it has been discovered to be irridescent black. Mira!