Lt. J.C. Ives and his Grand Canyon adventure
By Marshall Trimble Little was known about the navigability of the Colorado River above Fort Yuma until 1858 when Capt. George Johnson took his steamboat, a side-wheeler dubbed the General Jessup upstream from Fort Yuma. On his heels was, Lt. Joseph Christmas of the Army Corps of Topographical Engineers and his iron-hulled, 54-foot-long military stern-wheeler, aptly named the Explorer. They both set out to ...
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