The Great Unknown The Journals of the Historic First Expedition Down the Colorado River By BY JOHN COOLEY

1988 Hardcover,

first edition

Very Good Condition

Grand Canyon

The Great Unknown: The Journals of the Historic First Expedition Down the Colorado River is a historical compilation edited by John Cooley, originally published in 1988 by Northland Publishing. The book presents a curated, day-by-day chronological account of John Wesley Powell's legendary 1869 exploration of the Grand Canyon and Colorado River, compiled directly from the surviving diaries, letters, and logbooks of the crew