Headlam John, A Letter to the Rt Hon Robert Peel, one of His Majesty's principal secretaries of state, andc andc andc on prison labour, 1823, Volume: 056-003. Lord Eldon Manuscript Collection, MSS-056. Manuscripts. https://aspace.ll.georgetown.edu/public/repositories/3/archival_objects/30011 Accessed January 22, 2025.