Drawing on rarely examined diaries and journals, Down the Great Unknown is the first book to tell the full, dramatic story of the Powell expedition. On May 24,

This work charts the epic adventures of the first white men to explore the Grand Canyon, the last unmapped region of the United States. By 1869, the map of the

0n May 24, 1869, a one-armed Civil War veteran named John Wesley Powell and a ragtag band of nine mountain men embarked on the last great quest in the American

The epic story of the fastest boat ride in history, on a hand-built dory named the "Emerald Mile," through the heart of the Grand Canyon on the Colorado river.

This text is a magisterial account of John Wesley Powell, the great American explorer and environmental pioneer. It tells the true story of undaunted courage in