قصة الكتاب :
A Canyon Voyage: The Narrative of the Second Powell Expedition Down the Green-Colorado River from Wyoming, and the Explorations on Land, in the Years 1871 and 1872.\r\n\r\nPractically a second volume of the author\'s \"Romance of the Colorado river\". cf. Pref. The only detailed account of the second descent of the Colorado river under the leadership of J. W. Powell. The narrative of the first Expedition of 1869 was published by the Smithsonian institution in 1875 in a report issued under title: Exploration of the Colorado river of the West and its tributaries.