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Throughout this area during the last several centuries, rock ledges gave protection to Lipan, Kickapoo, Comanche, and Kiowa Indians. In one typical shelter archeologists found evidence of 3 periods of occupation, plus numerous intricate petroglyphs (rock carvings). River shells, turkey and deer bones, flint knives, scrapers, and points lay about the area. One of several hearths (2' x 3' in size) consisted of small pieces of sandstone lining a natural rock trough. On the highest level was found green bottle glass from nearby Fort Chadbourne (1852-1867). (1970)