The declivity is thus very great (see the diagram on page 57, which gives from the Little Colorado down), the total fall being 2330 feet.

Further comment on the character of the river within this wonderful gorge is unnecessary.

Powell had been through it on his first expedition, and was now to make the passage again, to examine its geological and geographical features more in detail.

Meanwhile, as recorded in the last chapter, Lieutenant Wheeler had made an effort, apparently to forestall this examination, and had precariously succeeded in reaching Diamond Creek, which is just at the south end of the Shewits Plateau, lower left-hand corner of the map facing page 41.

Powell and Thompson arrived at our camp at the mouth of the Paria on the 13th of August (1872) accompanied by Mrs.Thompson, who had been at Kanab all the previous winter, and had pluckily made several trips with Thompson into the mountains, and Professor De Motte.