It was formerly the custom to call a public confession of illicit sexual intercourse at intervals. Some man, given the right in a dream to call such an assembly, gathered the people together in his lodge, where they owned up. First the elders, then the youths, and then the women. A large painted spirit rock was present, placed in the center of the floor, to render the occasion one of solemnity. The stone heard their words, and disaster overtook all liars. Men who did not tell the truth were certain to be slain on their next war party. The participants sat in a circle in the tent about the stone and were quizzed one after another by the dreamer-host. Those who had unnatural intercourse with their spouses were obliged to confess it. Once, according to Dauphin Myron, a girl refused to speak, and her father was sent for, who ordered her to make a clean breast of her sin, whereupon she confessed that she had transgressed with him. . . .1

1Skinner, A.n/an/an/an/an/a, "Political Organization, Cults and Ceremonies of the Plains-Ojibway and Plains-Cree Indians," Amer. Mus. Nat. Hist., Anth. Pap., 11: 506–507.