| Timothy H. O'Sullivan 22. Circle Wall, Canon de Chelle. Here the Canon bends from an easterly direction, nearly due north, the walls maintaining a perpendicular height of about 1,200 feet. [Wheeler Survey, Explorations and Surveys West of the 100th Meridian] 1871-1874 (survey), 1873 (expedition) Stereocard Etherton Gallery LL/24752
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