(1) A Partial List of the Families Who Resided in Bucks County, Pennsylvania, Prior to 1687, with the Date of their Arrival, Pennsylvania Magazine of History and Biography, Vol. 9 (1886): 223-233.
(2)Walter Lee Sheppard, Passengers and Ships Prior to 1684: Penn's Colony: Genealogical and Historical Materials Relating to the Settlement of Pennsylvania, Vol. I (1970; reprint, Baltimore: Genealogical Publishing Co., 1985).