Prior to 1941, excavations of the site by Franz Blom were published, and were read by Indiana Jones. In July 1941, the Akashic Hall of Records, a mystical repository of knowledge whose location could shift around the world, moved its entrance to a doorway set into the lower side of the pyramid. Having seen a vision of the Hall's current location by using the stone sphere "key" at the Three Sisters formation in Costa Rica, Jones flew to the pyramid aboard Bert Brodowski's biplane. The Nazi agent masquerading as US Army Intelligence, Major Nichols had also discovered the Hall of Records' location, and managed to beat Jones to the site, and hid his plane.