The next year , Peter and Hannah Denison were freed .
The next year , Peter and Hannah Denison were went to work for Elijah Brush , who encouraged them to sue for the freedom of their children under the Northwest Ordinance , which prohibited slavery in the territory .
The next year , Peter and Hannah Denison were freed and went to work for Elijah Brush , who encouraged them to sue for the freedom of their children under the Northwest Ordinance , which prohibited slavery in the territory .