"Aug. 11.--It was not till the third day after commencing their search that they met with any success. Capt. Lewis perceived with the greatest delight, at the distance of two miles, a man on horseback coming towards them. On examining him with the glass, Capt. Lewis saw that he was of a different nation from any we had hitherto met. He was armed with a bow and a quiver of arrows, and mounted on an elegant horse without a saddle; while a small string, attached to the under-jaw, answered as a bridle. Convinced that he was a Shoshonee, and knowing how much our success depended upon the friendly offices of that nation, Capt. Lewis was anxious to approach without alarming him. He therefore advanced towards the Indian at his usual pace. When they were within a mile of each other, the Indian suddenly stopped. Capt. Lewis immediately followed his example; took his blanket from his knapsack, and, holding it with both hands at the two corners, threw it above his head, and unfolded it as he brought it to the ground, as if in the act of spreading it. This signal, which originates in the practice of spreading a robe or a skin as a seat for guests to whom they wish to show kindness, is the universal sign of friendship among the Indians. As usual, Capt. Lewis repeated this signal three times. Still the Indian kept his position, and looked with an air of suspicion on Drewyer and Shields, who were now advancing on each side. Capt. Lewis was afraid to make any signal for them to halt, lest he should increase the suspicions of the Indian, who began to be uneasy; and they were too distant to hear his voice. He therefore took from his pack some beads, a looking-glass, and a few trinkets, which he had brought for the purpose; and, leaving his gun, advanced unarmed towards the Indian, who remained in the same position till Capt. Lewis came within two hundred yards of him, when he turned his horse, and began to move off slowly. Capt. Lewis then called out to him, as loud as he could, 'Tabba bone,'--which, in the Shoshonee language, means _White man_; but, looking over his shoulder, the Indian kept his eyes on Drewyer and Shields, who were still advancing, till Capt. Lewis made a signal to them to halt. This, Drewyer obeyed; but Shields did not observe it, and still went forward. The Indian, seeing Drewyer halt, turned his horse about, as if to wait for Capt. Lewis, who had now reached within one hundred and fifty paces, repeating the words, 'Tabba bone,' and holding up the trinkets in his hand; at the same time stripping up his sleeve to show that he was white. The Indian suffered him to advance within one hundred paces, then suddenly turned his horse, and, giving him the whip, leaped across the creek, and disappeared in an instant among the willows. They followed his track four miles, but could not get sight of him again, nor find any encampment to which he belonged.