The teeming animal life of the great plains might have suggested to Long and his associates its adaptability to the needs of man; but for the occupation of the land without political peril, at least two agencies were required, which were, in their day, hardly more than dreams. We cannot blame the explorers for failing to anticipate the marvels of the railroad and the irrigating ditch; indeed, the repulse of the agricultural vanguard which attempted the invasion of the plains west of the hundredth meridian only half a generation ago, vindicates the prediction that the country could not be possessed by methods then known. It may be doubted whether their conservatism was not wiser than the confidence of the more ardent expansionists; yet it is doubtless true that their report, by depreciating the estimate of the value of the region, put weapons into the hands of those Eastern men who cherished a traditional jealousy of Westward expansion, and caused the government rather to follow than to lead the movement. Another apparent ground for criticism is the failure of the expedition to accomplish either of the great objects mentioned in the instructions--the discovery of the sources of the Platte and of the Red. The readiness with which the explorers relinquished their efforts to penetrate the mountains at the cañons of the Platte and Arkansas, although the season was midsummer, seems to indicate inefficiency as well as indifference to instructions. Likewise, when the Canadian was reached and mistaken for the Red, no effort was made to ascend the stream to its source; the explorers were content to descend the river, leaving the exact location of its head undetermined. Some excuse for this conduct is afforded by the inadequacy of the equipment provided by Congress for this enterprise. The federal government supplied six horses; the remainder of the thirty-four were furnished by the members of the party. "Our saddles and other articles of equipage," wrote James, "were of the rudest kind, being, with a few exceptions, such as we had purchased from the Indians, or constructed ourselves;" and, he adds, that the "very inadequate outfit . . . was the utmost our united means enabled us to furnish." Consequently, the party was compelled to subsist largely upon the country explored, and its movements were in no small degree dictated by the fear of want. That many of the hardships experienced were due to the slender outfit, is proved by the comparative comfort with which later parties followed in their footsteps. Twenty-five years afterwards, Colonel Abert, starting from Bent's Fort, on the upper Arkansas, not many miles from the point where Long's forces had divided, crossed the upland to the Canadian and descended to its mouth, following essentially Long's route, and making the whole journey in wagons, for which, save in a few places, a smooth course was found. This party succeeded in finding sufficient water