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A. Ruins of little stone terraces at Rincon Canyon. The stones have here been much disturbed bv occasional floods. In places where thev are 



less disturbed, bushes hide them and make photography difficult. 



B. Defensive Hohokam walls on a hilltop near San Xavier. 



C. Looking down from the top of the Trincheras of the iMagdalena River, showing terraced fields on the dry slope and modern irrigated fields at 



Its base. Tlie rectangle in the center of the terraces is the ceremonial platform described on page 68. 



D. Sue of an ancient village in Southern .Arizona, metate and mani stones for grinding seeds in the foreground. 



