New York: A. L. Burt, (1913). Hardcover - From a publisher's ad: "The story deals with a little-known stretch of river, from the Gulf of California to the Grand Canyon. The plot is a strong one, and the clue sought is at last discovered by two venturesome lads who start out to have a Òlittle fun of their own on the side." As in all other volumes of this aeries, the authorÑperhaps the best-known writer of boysÕ books in the countryÑtells something of the history of the country the boys pass through." Glossy frontispiece of the Grand Canyon. 256 pp.