Both parties returned without bringing any information that would settle the point. Which was the true Missouri still remained uncertain. Under these circumstances, it became necessary that there should be a more thorough exploration, and the next morning Captains Lewis and Clark set out at the head of two separate parties, the former to examine the north, and the latter the south fork. In his progress Captain Lewis and his party were frequently obliged to quit the course of the river and cross the plains and hills, but he did not lose sight of its general direction, and carefully took the bearings of the distant mountains. On the morning of the third day he became convinced that this river pursued a course too far north for his contemplated route to the Pacific, and he accordingly determined to return, but judged it advisable to wait till noon, that he might obtain a meridian altitude. In this, however, he was disappointed, owing to the state of the weather. Much rain had fallen, and their return was somewhat difficult, and not unattended with danger, as the following incident, which occurred on June 7th, will show: “In passing along the side of a bluff at a narrow pass thirty yards in length, Captain Lewis slipped, and, but for a fortunate recovery by means of his spontoon, would have been precipitated into the river over a precipice of about ninety feet. He had just reached a spot where, by the assistance of his spontoon, he could stand with tolerable safety, when he heard a voice behind him cry out, ‘Good God, captain, what shall I do?’ He turned instantly, and found it was Windsor, who had lost his foothold about the middle of the narrow pass, and had slipped down to the very verge of the precipice, where he lay on his belly, with his right arm and leg over it, while with the other leg and arm he was with difficulty holding on, to keep himself from being dashed to pieces below. His dreadful situation was instantly perceived by Captain Lewis, who, stifling his alarm, calmly told him that he was in no danger; that he should take his knife out of his belt with his right hand, and dig a hole in the side of the bluff to receive his right foot. With great presence of mind he did this, and then raised himself on his knees. Captain Lewis then told him to take off his moccasins and come forward on his hands and knees, holding the knife in one hand and his rifle in the other. He immediately crawled in this way till he came to a secure spot. The men who had not attempted this passage were ordered to return and wade the river at the foot of the bluff, where they found the water breast-high. This adventure taught them the danger of crossing the slippery heights of the river; but as the plains were intersected by deep ravines, almost as difficult to pass, they continued down the river, sometimes in the mud of the low grounds, sometimes up to their arms in the water; and when it became too deep to wade, they cut