(2) Charles G. Steffen, The Pre-Industrial Iron Worker: Northampton Iron Works, 1780-1820, Labor History, Vol. 20, No. 1 (1979): 89-110, citing May 31, 1788, Day Book 1788-1789, B-14, Northampton Furnace, Ridgely Account Books (Maryland Historical Society, Baltimore).
(2) R. Kent Lancaster, "Almost Chattel: The Lives of Indentured Servants at Hampton-Northampton, Baltimore County," Maryland Historical Magazine, Vol. 94, No. 3 (Fall 1999).