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This stereo image by Timothy O'Sullivan was taken during an expedition authorized by the United States Congress for the purpose of mapping that portion of the nation west of the 100th Meredian. O'Sullivan, who first gained prominence for his images taken during the Civil War, was the official trip photographer for the ambitious exploratory survey under the supervision of George M. Wheeler. O'Sullivan's images are among the first ever to reveal the landscapes and inhabitants of Navajo country.
