Dealing with the most famous of the two source pre Indiana Jones Joneses has not left is without other contenders.  I am sure there are even more than managed to make my list. But these are the ones I am familiar with, and can give the best account of, or advice for reading about.  The third individual on our quest to find the source was different from his two predecessors by one chief enterprise: he was actually a trained archaeologist. Sylvanus Morley was, in fact, a Mayanist. He studied at length in Latin American and published several books, and many papers on the Mayan iconography among other things.  He also published his diaries, a huge effort of 39 volumes running the gamut of his active years (1905-1947) trying to unravel the mysteries of the Maya of Mexico and Central America.  Little is known or discussed about Dr. Morley outside of individuals who actually study the Maya presently. In fact, there are a few who do not know the history of their own field, save some disdain, or unkind words for their predecessors. But all that changed (or has it?) in 2009 when Charles Harris and Louis Sadler published The Archaeologist was a Spy: Sylvanus G. Morley and the Office of Naval Intelligence.  Aside from being one of the books that helped solidify my desire to study the history of science (namely the people at the forefront and/or the births of their respected fields), it revealed to me that many people who work in fields today have no idea where their intellectual infrastructure comes from. Others, can specifically name a mentor, or a grandmentor (that would be their mentor’s mentor for you folks playing along at home) but most cannot trace influence back more than a few academic generations.