After locating the town-site at Yuma there was nothing to do but to cross the desert from the Colorado River to San Diego. We made the journey on mules, with extraordinary discomfort. At San Diego we were as much rejoiced as the followers of Xenophon to see the sea. The town-site was duly registered in San Diego, which could not have been done if both banks of the Colorado just below its junction with the Gila had not been recognized as being within the jurisdiction of the State of California. The county of San Diego collected taxes there for many years. After the organization of the Territory of Arizona in 1863, Arizona assumed jurisdiction over the slip, and built a prison there. Congress subsequently made a grant of land included in the slip to the "Village of Yuma," so that it is a mere question of jurisdiction, not involving the validity of any titles. The question of jurisdiction still remains unsettled, as it requires both an Act of Congress and Act of the State Legislature to change the boundaries of a sovereign State. The town-site of Yuma has grown slowly, but there will be a town there as long as the two rivers flow. The Southern Pacific Railroad was completed years ago, and forms the great artery of commerce. Immigration enterprises of great magnitude have been undertaken with the waters of the Colorado River. The river washes fully three hundred thousand square miles, and furnishes a water power in the cataracts of the Grand Cañon only second to Niagara. "At Yuma, on the Colorado River, the only attempt at irrigation so far made is by pumping works, which raise the water from the river and convey it in pipes to the lands to be watered. While thus far only a limited area is watered by this method, the results are satisfactory, and the expense no greater than in many of the pipe systems of California. "But for the magnitude, scope, and the boldness of its purpose, the project to irrigate the great Colorado Desert is without a parallel in the arid West, if in the world. "This undertaking contemplates the construction of gravity canals from a point in the Colorado River, several miles above Yuma, and the conducting of the waters of this river over an arid waste, that, while forbidding in appearance, is known to be capable of great fertility. One interesting feature of this plan to reclaim the desert is found in the character of the water to be utilized. Analysis shows that the water of the Colorado River carries a larger percentage of sedimentary deposit than any other river in the world, not excepting the Nile. The same is true, in a relative degree, of all the other rivers in Arizona. By constant use of these waters the soil not only receives the reviving benefits of irrigation, but at the same time a very considerable amount of fertilizing material.