I had known al-Mammun when he was our vassal. Loaded with official honors for services rendered, enriched by the French Government and respected by the tribes, he seemed to lack for nothing that belonged to the state of an Arab prince. And yet one night, without a sign of warning, he had massacred all the French officers in his train, had seized camels and rifles, and had fled to rejoin the refractory tribes in the interior. . . . And yet the story of al-Mammun was that of many other Arab chiefs. He grew old. Growing old, one begins to ponder. Pondering thus, al-Mammun discovered one night that he had betrayed the God of Islam and had sullied his hand by sealing in the hand of the Christians a pact in which he had been stripped of everything. Indeed what were barley and peace to him? A warrior disgraced and become a shepherd, he remembered a time when he had inhabited a Sahara where each fold in the sands was rich with hidden mysteries; where forward in the night the tip of the encampment was studded with sentries; where the news that spread concerning the movements of the enemy made all hearts beat faster round the night fires. He remembered a taste of the high seas which, once savored by man, is never forgotten. And because of his pact he was condemned to wander without glory through a region pacified and voided of all prestige. Then, truly and for the first time, the Sahara became a desert.