 It appeared, therefore, that the foot of the Black canon should be considered the practical head of navigation, and I concluded to have a reconnaissance made to connect that point with the Mormon road, and to let this finish the exploration of the navigable portion of the Colorado.Returning to the Mohave Villages, he then struck out across northern Arizona to Fort Defiance.Ives reported his findings in his 1861 "Report upon the Colorado river of the West" The Ives expedition produced one of the important early maps of the Grand Canyon drawn by Frederick W. von Egloffstein, topographer to the expedition.