East Granby in the Revolution
Old New-Gate Prison. Tier 2 - One sourced story.
Sourced Claims
[Verified] Old New-Gate Prison - a converted copper mine - held Loyalist prisoners and was one of the nation's first state prisons. - ConnecticutHistory.org
[Verified] Conditions underground were notoriously harsh; prisoners were lowered into the mine shafts, which served as cells. - CT State Historic Preservation Office