2 Anne Wharton, “The Wharton Family,” PMHB I (1877), 324-26.
3 Jane W. T. Brey, A Quaker Saga: The Watsons of Strawberyhowe, the Wildmans and Other Allied Families from England’s North Counties and Lower Bucks in Pennsylvania (Philadelphia, 1967).
4 Joseph Sharpless, Family Record: Containing the Settlement and Genealogy to the Present Time of the Sharples Family in North America (Philadelphia, 1816).