Heights and Depths. The height of the lime and sandstone walls can readily be measured by looking down upon the rudely carved mass of red sandstone slightly to the left, which has been called the "Battleship." The top of this is five thousand, eight hundred and sixty-seven feet above sea level. Now look up to the Maricopa Point above, seven thousand and fifty feet. The difference is one thousand, one hundred and eighty-three feet, which is practically the height of these two strata.

Bright Angel Creek. Almost at the first glance, the attention is arrested by the break in the north wall, slightly to the right of where we stand, which makes a wide lateral gorge running at right angles to the main course of the river. This is Bright Angel Gorge, showing the course of Bright Angel Creek, which flows between its lower walls. It received its name from Major Powell, when he and his party descended the river. Earlier in their explorations they had ascended a side stream, and one of the men had declared it to be a dirty devil of a river; and for many years it bore the name "Dirty Devil River," until Powell changed it on the map to Fremont River. When, later, this exquisitely pure and beautiful side stream was reached, the great explorer determined that as one stream had been named after the prince of the powers of darkness, he would name this after the bright and beautiful powers,--hence the name "Bright Angel."