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July 11, 1936 No. 76 Aviation Prospect No. 4 "HOWAWEET". Note distinct workings in white outcrop near the group of ancient ruins. These ruins were easily visible from the airplane at heights of 15,000 ft. and distances of 20 miles or more. Altitude of Photograph: 5,500 ft. [[end page]] [[start page]] [[image - aerial photograph of Aviation Prospect No. 4 "HOWAWEET".]]