MG-137. JASPER YEATES FAMILY PAPERS, 1726-1830 (bulk 1761-1812).
Correspondence, accounts, and legal papers of Jasper Yeates (1745-1817), Lancaster attorney, chairman of Lancaster County Committee of Correspondence, 1775, captain of the Lancaster County Associators, 1776, a commissioner for Indian Affairs, 1776, and associate justice of the Pennsylvania Supreme Court, 1791-1817. Also found are materials relating to Jasper’s father, Philadelphia merchant John Yeates.
Accounts, 1725-1804, and undated. Included is a document dated July 19, 1774 signed by Calvin Cooper concerning the "trial of capital offenses committed by negroes in the province of Lancaster County" and "of a mulatto slave named Ester who mothered a bastard child."