Pub. USA 1969. Includes river map, historic photographs and 'Major Powell's Own Story' ('One hundred years ago Major John Powell, a Civil War veteran who had lost his right arm in the Battle of Shiloh, led the first voyage to explore the Grand Canyon.' Before then 'the canyon appeared on maps of the West as a mysterious void'.) Annotated in Rosemary Murray's hand with details of her trip, no date given though presumably no earlier than 1969.