After reading about the map's discovery in The Illustrated London News, United States Secretary of State Henry L. Stimson contacted the United States Ambassador to Turkey Charles H. Sherrill and requested that an investigation be launched to find the Columbus source map, which he believed may have been in Turkey.
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More notoriously these claims were repeated in Erich von Däniken's Chariots of the Gods (which attributed the knowledge of the coast to extraterrestrials) and Gavin Menzies's 1421: The Year China Discovered America (which attributed it to supposed Chinese voyages), both of which were roundly denounced by both scholars and debunkers of fringe works but which attracted huge popular followings.
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