In 1874 the brilliant civil engineer Sarat Chandra Das was recruited by the British as a spy in Darjeeling. The Empire wanted to train local agents to gather in-depth intelligence about Tibet—a mysterious kingdom closed off to all outsiders for years—in order to consolidate their position in South Asia and outplay Russia in the Great Game. Equipped with hidden compasses hundred-bead rosaries (to discreetly measure distances) and an excellent knowledge of Buddhism and the local language Das s