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Timothy H. O'Sullivan
6. View of the Grand Canon walls, near mouth of Diamond River. From waterline to first shelf 1,500 feet; from shelf to top of table 3,500 feet. Distance from point of view to top of walls 3 miles.
[Wheeler Survey, Explorations and Surveys West of the 100th Meridian]
1871-1874 (survey), 1871 (expedition)