From The Emperor Far Away: Travels at the Edge of China, by David Eimer (Bloomsbury, 2014), Kindle p. 59:
Kashgar’s consulate was the most remote of Britain’s diplomatic outposts in Asia, a three-week ride on horseback from India. The people who passed through included some of the most remarkable figures from the colonial past. The half-Chinese Sir George Macartney, whose same-named ancestor was Britain’s first ambassador to China in the eighteenth century, served as consul here between 1890 and 1918. Sir Percy Sykes, who effectively ran Persia during the First World War, relieved Macartney briefly in 1915.
Great Game players, both legendary and unsung, were regular visitors. Francis Younghusband stayed a winter. He went on to lead a British invasion of Tibet in 1903–4, only to experience an epiphany on the roof of the world that transformed him from an empire-builder into a soldier-mystic. In 1918, Colonel F. M. Bailey was at the consulate en route to an extraordinary series of adventures in central Asia. They included helping to propagate the revolt among Muslims which resulted in so many Kyrgyz crossing into Xinjiang after the Russian Revolution.
Bailey was such an effective spy that he was recruited by the Cheka, the forerunner of the KGB, to hunt himself, the British agent who was stirring up the peoples of central Asia against their new communist masters. He was also a noted naturalist, just as Sykes and Eric Shipton, the last British consul in Kashgar, were part-time explorers. In the days of empire, it was possible to serve your country and collect rare butterflies on the Tibetan plateau, conquer unclimbed mountains or cross unmapped deserts.