R. B. Cunninghame Graham's trek into the Moroccan interior beyond Marrakesh is a classic example of British adventure travel. His ostensible purpose was to reach the forbidden city of Tarudant, where it was claimed no Christian had ever set foot, and which he attempted while variously disguised as a Turkish doctor and a sheikh from Fez. In the end, Cunninghame Graham's mission was a failure: halfway to his goal, he was captured and held prisoner for four months in the medieval castle of Kintafi in the Atlas Mountains. But his loss was the reader's gain, as Edward Garnet points out in his...