On a table land near the Gila Bend is a mound of granite bowlders, blackened by augite, and covered with unknown characters, the work of human hands. On the ground near by were also traces of some of the figures, showing some of the pictographs, at least, to have been the work of modern Indians. Others were of undoubted antiquity, and the signs and symbols intended, doubtless, to commemorate some great event. (See Ex. Doc. No. 41, 30th Cong., 1st sess. (Emory’s Reconnaissance), 1848, p. 89; Ill. opposite p. 89, and on p. 90.) Characters upon rocks, of questionable antiquity, are reported in the last-mentioned volume, Plate, p. 63, to occur on the Gila River, at 32° 38′ 13″ N. lat., and 109° 07′ 30″ long. [According to the plate, the figures are found upon bowlders and on the face of the cliff to the height of about 30 feet.] The party under Lieutenant Whipple (see Rep. Pac. R. R. Exped., III, 1856, Pt. III, p. 42) also discovered pictographs at Yampais Spring, Williams River. “The spot is a secluded glen among the mountains. A high, shelving rock forms a cave, within which is a pool of water and a crystal stream flowing from it. The lower surface of the rock is covered with pictographs. None of the devices seem to be of recent date.” Many of the country rocks lying on the Colorado plateau of Northern Arizona, east of Peach Springs, bear traces of considerable artistic workmanship. Some observed by Dr. W. J. Hoffman, in 1871, were rather elaborate and represented figures of the sun, human beings in various styles approaching the grotesque, and other characters not yet understood. All of those observed were made by pecking the surface of basalt with a harder variety of stone.