Telling three stories Phillip Seitz, Social Historian, worked for 9 years at Cliveden in Philadelphia. During that time an enormous number of the Chew Family Papers were discovered and turned over to the Historical Society of Pennsylvania. Included in those papers were letters Benjamin Chew received from the overseer of his plantation in the state of Delaware. Phillip is the author of the book, “Slavery in Philadelphia: A History of Resistance, Denial and Wealth”.