Dedicated to Father A. Delattre of the White Fathers of Cathage, Professor W. Kelsey of the University of Michigan, Edward Stoever of Princeton University, Prince E. de Waldeck, Professor Henry Washington of the Carnegie institute, Major F Shorey of McGill University, Professor G. Guidi of the Tripolitan museum, Professor Stephan Gesell of the French Academy, C. Chapius of the French Foreign Legion, and my other Arab and Ethiopian companions of the long Desert Trails who are no more.