(1) 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), 177.
(2) "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.