The Dunn inscription on Mt. Dellenbaugh. Oramel and Seneca Howland with Bill Dunn were the three who left the Powell party in 1869, Aug. They were killed before reaching the Mormon settlements
Papers of Otis R. Marston: Still images, 1870-1978. vols. 56-104, Colorado River and tributaries (Grand Canyon to Gulf of California) The Otis Marston Colorado River Collection
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