The Skystone - A Romance of Prehistoric Arizona #255475

In the Salt River valley, in central Arizona, the ruins of at least seven large cities are conspicuous, and the lines of ancient irrigating canals can be traced over the level land for miles. It has been assumed, with some reason, that the ancient inhabitants of the valley were akin to the pre Aztec race that built the grand temples that yet rear their heads in Mexico and Central America.