Not to mention the fact that the movie specifically makes it clear that the crystal skull the characters chase around after is emphatically not the Mitchell-Hedges skull. In the film, as soon as Indy sees carvings Oxley made of the skull on the walls of his room at the sanitarium, he specifically points at one of the…

Very funny (and with more than a couple fair points to make), but if I may be forgiven for my extreme Indy nerdery I feel compelled to point out that the letter is dated in early 1939 yet concerns Marshall, when it should probably be Barnett. In January '39 Indy was almost certainly still at Barnett College in upstate…