Talbot Mundy
Talbot Mundy (1879 – 1940) was a British-born writer of adventure stories during the early twentieth century. His most famous book is King of the Khyber Rifles, which is set in India under British Occupation. The long buildup to the introduction to Yasmini and the scenes among the outlaws in the Khinjan Caves clearly influenced fantasy writers Robert E. Howard and Leigh Brackett.
His related JimGrim series, which has mystical overtones and part of which is available over the web from theosophical sites, ran in Adventure magazine before book publication. Barbara Cartland adapted some of these novels for a series of romances.
Mundy actually was associated with Helena Blavatsky's movement.
He also wrote a number of stories about Tros of Samothrace, a Greek freedom fighter who aided Britons and Druids in their fight against Julius Caesar.