"In that long ago time when the earth was young, and people had not long been made, a man threw some weeds upon a fire and found that the odor, the smoke from their burning, was very pleasant. That night he had a vision and learned that this plant was strong medicine; that, when smoked in a pipe, which his vision explained to him how to make, it would be the right thing with which to offer prayers to the gods. He also taught the man the prayers and all the ceremony that went with the prayers; and told him how to plant the weeds, from the seeds on their tops, so that he could always have plenty of it. "This man was very much pleased with what he had learned. He went to his three brother medicine men and told them all about it, and the four of them formed a society of themselves and no others, for the raising of the weed and its proper uses. But they were very stingy with this weed, which they named _na-wak´-o-sis_, and would only now and then give the people a leaf of it, although they raised large numbers of the stalks in every summer time. "A young man named Lone Bull was very anxious to become a member of this medicine society, but because he had no medicines and knew not the rites of it, he was told that he could not join it. At that time the camp of the people was close under Chief Mountain. He left it, with his woman and his pack dogs, and moved up to the river running out of the Inside Lakes, and there set up his lodge. Said he then to his woman: 'I have come up here to get medicines; in some way to find things that will enable me to become a raiser of _na-wak´-o-sis_. If I can do that, I shall be of great help to the people. Now, then, I am going to hunt and collect all the medicine skins I can find, and you stay at home, take care of the lodge, gather wood, and cook what meat we need. I shall bring in plenty of fat meat along with the skins.' "The man went hunting every day, and the woman remained at home. One day, when the man was gone, she thought she heard singing; beautiful singing; but look where she would she could see no singers. She spoke to the man about it when he came home that evening, and made him feel uneasy: 'If you hear it again, look about more carefully,' he told her. "She heard it the next day, and this time located it, right under the lodge. She went out to the bank of the river and looked at the bank: there, under the water, were beaver holes in it, and beaver cuttings upon the sandy bottom, and by that she knew that the lodge had been set up above a bank beaver's home, and that beavers were the singers. She went back to the lodge, lay down and put her ear to the ground, and could then hear them plainly, and was pleased. Their singing was so good that it was all that she could do to stop listening to them and begin cooking the evening meal.