Homer grinned and said, "You'll work with me. We're going into Tuareg country. Whenever occasion calls for it, whip off that shirt and go strolling around with that overgrown chest of yours stuck out. The Tuareg consider themselves the best physical specimens in the Sahara, which they are. They admire masculine physique. You'll wow them." Cliff grumbled, "Sounds like vaudeville." Isobel said softly, "And me, El Hassan? What do I do?" Homer turned to her. "You're also part of headquarters staff. The Tuareg women aren't dominated by their men. They still have a strong element of descent in the matrilinear line and women aren't second-class citizens. You'll work on pressuring them. Do you speak Tamaheq?" "Of course." Homer Crawford looked up into the sky, swept it. The day was rapidly coming to an end and nowhere does day become night so quickly as in the ergs of the Sahara. "Let's get underway," Crawford said. "Time's a wastin'." * * * * * The range of the Ahaggar Tuareg was once known, under French administration, as the Annexe du Hoggar, and was the most difficult area ever subdued by French arms--if it was ever subdued. At the battle of Tit on May 7, 1902 the Camel Corps, under Cottenest, broke the combined military power of the Tuareg confederations, but this meant no more than that the tribes and clans carried on nomadic warfare in smaller units. The Ahaggar covers roughly an area the size of Pennsylvania, New York, Virginia and Maryland combined, and supports a population of possibly twelve thousand, which includes about forty-five hundred Tuareg, four thousand Negro serf-slaves, and some thirty-five hundred scorned sedentary Haratin workers. The balance of the population consists of a handful of Enaden smiths and a small number of Arab shopkeepers in the largest of the sedentary centers. Europeans and other whites are all but unknown. It is the end of the world. Contrary to Hollywood-inspired belief, the Sahara does not consist principally of sand dunes, although these, too, are present, and all but impassable even to camels. Traffic, through the millennia, has held to the endless stretches of gravelly plains and the rock ribbed plateaus which cover most of the desert. The great sandy wastes or ergs cover roughly a fifth of the entire Sahara, and possibly two thirds of this area consists of the rolling sandy plains dotted occasionally with dunes. The remaining third, or about one fifteenth of the total Sahara, is characterized by the dune formations of popular imagination. It was through this latter area that Homer Crawford, now with but one hover-lorry, and accompanied by Isobel Cunningham and Clifford Jackson, was heading.