When the party of explorers subsequently made ready to leave, signs of reluctance to have them go were apparent among the Indians. Finally, several of the chief warriors sat on the rope that held the boat to the shore. Irritated by this, Captain Lewis got ready to fire upon the warriors, but, anxious to avoid bloodshed, he gave them more tobacco, which they wanted, and then said to the chief, “You have told us that you were a great man, and have influence; now show your influence by taking the rope from those men, and we will then go on without further trouble.” This appeal to the chieftain’s pride had the desired effect. The warriors were compelled to give up the rope, which was delivered on board, and the party set sail with a fresh breeze from the southeast. The explorers were soon out of the country of the Teton Sioux and into that of the Ricaras, or, as these Indians are more commonly called, the Rickarees. On the first day of October they passed the mouth of a river incorrectly known as Dog River, as if corrupted from the French word chien. But the true name is Cheyenne, from the Indians who bear that title. The stream rises in the region called the Black Mountains by Lewis and Clark, on account of the great quantity of dark cedar and pine trees that covered the hills. This locality is now known as the Black Hills, in the midst of which is the famous mining district of Deadwood. In these mountains, according to Lewis and Clark, were to be found “great quantities of goats, white bear, prairie cocks, and a species of animal which resembled a small elk, with large circular horns.” By the “white bear” the reader must understand that the grizzly bear is meant. Although this animal, which was first discovered and described by Lewis and Clark, is commonly referred to in the earlier pages of the journal as “white,” the error naturally came from a desire to distinguish it from the black and the cinnamon-colored bears. Afterwards, the journal refers to this formidable creature as the grizzly, and again as the grisly. Certainly, the bear was a grizzled gray; but the name “grisly,” that is to say, horrible, or frightful, fitted him very well. The Latin name, _ursus horribilis_ is not unlike one of those of Lewis and Clark’s selection. The animals with circular curled horns, which the explorers thought resembled a small elk, are now known as the Rocky Mountain sheep, or bighorn. They very little resemble sheep, however, except in color, head, horns, and feet. They are now so scarce as to be almost extinct. They were among the discoveries of Lewis and Clark. The prairie cock is known to western sportsmen as “prairie chicken;” it is a species of grouse.