xxxiv Illustrations 
PAGE 
Looking down the Canyon de Chelly, a Tributary of 
THE San Juan and Containing many Cliff Houses . 345 
Photograph by Ben. Wittick. 
A Cave-Lake in a Sandstone Cliff near Kanab, South 
Utah. 349 
Photograph by J. K. Hillers, U. S. Colo. Riv. Exp. 
In Marble Canyon, about Midway between Paria and 
Little Colorado . . . . . . . -352 
Photograph by J. K. Hillers, U. S. Colo. Riv. Exp. 
Marble Canyon, Lower Portion ..... 355 
Walls about 3500 feet. 
From photograph by J. K. Hillers, U. S. Colo. Riv. Exp. 
Looking West from Jacob’s Pool on Road to Lee’s Ferry. 
Vermilion Cliffs in Distance.356 
Photograph by W. Bell. 
Robert Brewster Stanton . . . . . .35-^ 
Recent photograph by Kaufmann, Pittsburgh. 
The Grand Canyon ........ 360 
In the First Granite Gorge. 
Photograph by J. K. Hillers, U. S. Colo. Riv. Exp. 
The Great Unconformity ....... 362 
Top of the Granite, Grand Canyon. 
Photograph by T. Mitchell Prudden. 
Looking up the Grand Canyon, at the Foot of Toro- 
WEAP, UiNKARET DIVISION. 365 
Depth of inner gorge about 3000 feet—width, brink to brink, about 
3500 feet. 
Oil sketch by F. S. Dellenbaugh. 
The Grand Canyon—Lava Falls.366 
Just below the Toroweap. 
Total depth of canyon about 4500 feet. 
Photograph by J. K. Hillers, U. S. Colo. Riv. Exp. 
On the Bright Angel Trail. 367 
Photograph by T. Mitchell Prudden. 
John Wesley Powell, 1834-1902 ..... 373 
Green River from the U. P. Railway to White River, 
Showing Gorges through the Uinta Mountains . 378 
