(1) Richard J. Cox, "Servants at Northampton Forge, Baltimore County, Maryland," National Genealogical Society Quarterly, Vol. 63 (1975): 110-117.
(2) Richard J. Cox, “Maryland Runaway Convict Servants,†National Genealogical Society Quarterly 68 (June 1980): 105–14; 68 (September 1980): 232–33; 68 (December 1980): 299–304; 69 (March 1981): 51–58; 69 (June 1981): 125–32; 69 (September 1981): 205–14; and 69 (December 1981): 293–300, citing Maryland Journal.