Gabriel planned the revolt during the spring and summer of 1800. On August 30, 1800, Gabriel intended to lead slaves into Richmond, but the rebellion was postponed because of rain. The slaves' owners had suspicion of the uprising, and two slaves told their owner, Mosby Sheppard, about the plans. He warned Virginia's Governor, James Monroe, who called out the state militia. Gabriel escaped downriver to Norfolk, but he was spotted and betrayed there by another slave for the reward.