Above, left: Tibetans had traded for centuries over the Himalayan passes that would soon become familiar to the 1920s and 30s expeditions. Here, bales of wool are being transported to Sikkim from Tibet.
Photo: Lt.-Col. Howard-Bury, 1921
Above, right: Accompanied by two children, a Tibetan woman spins wool in the doorway of her home.
Photo: C.J. Morris, 1922