Wilfred Thesiger is the last of the great British eccentric explorers, renowned for his travels through some of the most inaccessible places on earth. As a child in Abyssinia he watched the glorious armies of Ras Tafari returning from hand-to-hand battle, their prisoners in chains; at the age of 23 he made his first expedition into the country of the Danakil, a murderous race among whom a man's status in the tribe depended on the number of men he had killed and castrated. His books, Arabian Sands and The Marsh Arabs, tell of his two sojourns in the Empty Quarter and the Marshes of Southern...