The proposal was to attack the fort and set free the prisoners.

Alarmed at the movement, Riel released all the prisoners in the fort.

Their object being gained, the men of the Kildonan Church camp, who had grown to be six hundred strong, dissolved, and were proceeding to their homes, when Riel, by an unheard of act of treachery, arrested some fifty of the Assiniboine party.

Among them was Major Boulton, a former officer of the 100th Regiment.

Riel again sought out a victim for revenge, and intended to execute this prominent man.