In some respects the most important of the early Colorado River exploration journals, the diaries of Almon Harris Thompson can naturally be divided into three sections: navigation of the Green and Colorado rivers; exploratory traverse from Kanab to the mouth of the Fremont River; and the systematic mapping of central, eastern, and southern Utah and northern Arizona. Thompson’s maps of the Colorado drainage basin, including the first maps of southern Utah and the canyons of the Green and Colorado rivers, place him in the front rank of geographic explorers and they proved invaluable to the later Powell expedition.

Originally published in 1939 as volume seven of the Utah Historical Quarterly, Thompson’s journal is reprinted here for the first time in seventy years. Co-published with the Utah State Historical Society.

The second Powell Colorado River exploration, consisting of eleven men and three boats at the time of launch, departed from Green River Station, Wyoming, on May 22, 1871. Most members kept journals, and this volume contains the writings of three men, Stephen Vandiver Jones, John F. Steward, and Walter Clement Powell, as well as excerpts from the journals of John Wesley Powell. Taken together, they provide diverse points of views about the second expedition, both in terms of its human components and in its scientific labors.

Originally published from 1948 to 1949 as volumes sixteen and seventeen of the Utah Historical Quarterly, this volume looks to the larger significance and fruits of the second of Powell’s explorations, a more carefully constituted and better equipped scientific operation, yet one strangely neglected in historical records. Copublished with the Utah State Historical Society.