"For    Into the Silence: The Great War, Mallory, and the Conquest of Everest,  by Wade Davis,   (Knopf, 2016). Map copyright © Wade Davis.  This is a colorized detail from the ""Inner Massif"" map, showing the Mallory expedition's final approaches to Everest from the north.  At the time Tibet was open to the British, Nepal was not."
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