After leaving Pompey's Pillar "the great river, though apparently undiminished in volume, grew more and more swift, constantly breaking into rapids through which it was necessary to warp and spar the boat, while numberless small islands split the channel into chutes, no one of which was large enough for easy navigation. At times it seemed that a smooth stretch of water had been reached, ... but invariably just beyond another rapid would be encountered.... Before nightfall a tremendous rapid was encountered, and though, after a hard struggle, it was successfully passed, so forbidding was its aspect and so savage the resistance it offered, that it was appreciatively named 'Hell Roaring Rapids.' At the head of it the boat lay up for the night, with a line stretched to the bank ahead to help her forward in the morning. But when dawn came, General Forsyth, seeing the nature of the river in front, ordered out a reconnoitring party who marched up the bank for several miles examining the channel. On their return they reported the whole river ahead so broken up by islands and with so powerful a current that it could not be navigated without constant resort to warping and sparring.... General Forsyth and Captain Marsh held a consultation and decided that no adequate reward for the labour involved could be gained by going further. So, at two o'clock p. m. on June 7th, the boat was turned about and started on her return.... Before leaving this highest point attained, Captain Marsh blazed the trunk of a gigantic cottonwood to which the _Josephine_ was tied, and carved thereon the name of the boat and the date. It is exceedingly improbable that a steam vessel will ever again come within sight of that spot or be entitled to place her name beneath the _Josephine's_ on that ancient tree trunk, almost under the shadow of the Rocky Mountains." [Illustration: THE COUNTY BRIDGE OVER THE YELLOWSTONE]