Here he met the pilot who was to lead him over the desert to study the territory at close range. After studying the canal site, on horseback, for a few days, they boarded an aeroplane, which was well provisioned, and soon they were flying over vast stretches of sand. They made wide detours, in their flight, so as to get a more general view of the situation. Finally they turned southward to reach Timbuktoo on the Niger river. Two nights were spent on well selected ground. On the third day they came to the Queen City of the Sahara, Timbuktoo, where they intended replenishing their gasoline supply, and thus be able to return to the Mediterranean coast. During the entire flight Carl was busy making copious notes to be used in connection with his plans on his return to America. Carl was proud of his mission. And rightly so. The son of a New York banker, with the advantages of a family name and all that wealth could buy, he had spurned them, rising in his profession solely by his own ability and perseverance. His college days over, Carl had gone to San Francisco. Here he secured employment with an engineering concern engaged in extensive hydraulic and land irrigating developments. A few years of this work and he returned to New York, where he joined an efficiency engineering firm. Here, too, he showed his ability. By his methods of handling material in various manufacturing plants much money was saved and with greater efficiency. Electric stations, he proved, could be operated at less cost, while in the field of street lighting, several cities benefited by his knowledge, securing better light and at a great saving to the municipality and the electric power companies. Carl recognized as his greatest asset the teachings of his parents. From childhood he had been taught by them the virtue of “Economy and Efficiency.” It had been their watchword through life and he was determined that it should be his. Not alone to himself but to those who came to him for advice did he preach this doctrine. His books and numerous scientific publications, too, brought home to the reader the value of those two words. Before establishing himself in a business of his own, he widened his field of activity, going to the Charlottenburg University to study city planning and its kindred subject, municipal engineering. Charlottenburg was the only college teaching these subjects, although German cities, for the past two generations, have been practicing the art in connection with municipal improvements.