As the sun rose over camp on the morning of August 17, 1805, Captain Meriwether Lewis sent his interpreter George Drouillard downstream to search for Captain William Clark and the rest of the expedition after a restless night of worry over their fate. During the previous week, Lewis and three men had gone ahead of the slow-moving canoes, found the Shoshoni camped on a river over the mountains to the west in present-day Idaho, and returned on the evening of the 16th with a small party from the village to camp just below the forks. Expecting to meet Clark, whom the Shoshoni knew as the chief with red hair, they waited nervously before dawn. Concerned for his people's safety, Chief Cameahwait sent several of his men to accompany Drouillard, since the Shoshoni had been reluctant to follow the strangers for fear of a trap. Lewis had promised that Clark would arrive with trade items, because he urgently needed the Shoshoni's help and hoped to obtain horses from them to continue the journey, so keeping their confidence was essential. Drouillard and the warriors rode less than two miles downstream and found the men dragging the canoes over a gravel bar. Clark had heard the Shoshoni warriors singing before they appeared, and Sacajawea, walking out in front, recognized them as riders of her tribe, the Aqaidika, or Salmon Eaters. Excited, she looked back at Clark and danced and sucked her fingers in sign language to show that these were her people. As Clark, Sacajawea, and her husband Charbono entered camp, Lewis, Cameahwait, and the rest of the Shoshoni gathered to greet them. From the waiting party, an excited young woman ran out to embrace Sacajawea. Five years earlier, two young girls had been captured in a raid; one escaped and returned to her people, while the other had been taken to the Mandan villages, where she became a vital member of the Corps of Discovery.