The Indians seem to have at once despatched messengers with the news of these hostilities to the bands at the Upper Sioux Agency, at Yellow Medicine. The chiefs there immediately called their followers into council. About one hundred Sissetons, Wahpetons, and thirty young Yanktons, were present. The council was stormy, and divided in sentiment; the Sissetons urging the killing and robbing of the whites, saying the M'dewakantons had already gone so far that they could not make matters worse, and that, as the whites would inflict punishment upon all alike, the best thing to be done was to kill them and take their goods. The Wahpeton chiefs, though willing to rob the whites, insisted on sparing their lives, and sending them off with their horses and wagons across the prairies. About one fourth of the Sioux, previous to these events, had, through the efforts of the Government and missionaries, renounced their savage life, and adopted the customs of civilization. They had cut off the hair, discarded the blanket, adopted the civilized costume, and undertaken to live by the cultivation of the earth, instead of the chase. One of the chiefs who joined in this reform was An-pe-tu-to-ke-ca, or Other-Day, an Indian of more than ordinary intelligence and ability. He had been much among the whites, and was a convert to Christianity. Some years previous, while he was at Washington city with a delegation of his tribe, a rather good-looking white woman, who had lost caste in society, fell in love with him, married him, and followed him to his Indian home in Minnesota. Other-Day took part in this deliberation. He arose and addressed the council, warning them against the consequences of the attack they were meditating. They might succeed in killing a few whites, he told them, but extermination or expulsion would be their fate if they did. But his pacific arguments produced no effect. Toward evening, the Yanktons, Sissetons, and a few of the Wahpetons rose from the council, and moved toward the houses of the whites, to prepare for the attack. All the afternoon the Indians had been busy taking their guns to the blacksmith shop to have them repaired, which the unsuspecting smith, being told they were going on a buffalo hunt, had done. Other-Day now left the council, took his wife and his gun, and went to warn the whites of the impending danger. They had, up to this time, known nothing whatever of the council. At his suggestion, sixty-two persons assembled in one of the Agency buildings, gathered their arms, and prepared to defend themselves. Part of the farmer Indians assisted Other-Day in standing guard round the house that night, part of them guarded the house of Rev. Mr. Riggs, their old missionary, to whom they were very much attached, and another part joined the insurgents.