"Ephraim Jackson was a member of the Provincial assembly of PA in 1710. He visited Cheshire about 1709. Being a good penman he kept records of the Society of Friends and wrote many deeds, marriage certificates and other records which are still in existence." (2)
(1) "The Registers Office of All Persons Residing or Inhabiting within the County of Berks, As Well Freemen & Servants & the Time of the Said Servants Freedome & Wages, 1681-1689," Historical Society of Pennsylvania, Philadelphia, Pennsylvania, Microfilm 20452 Item 2, Family History Library, Salt Lake City, Utah.
(2) I. Ernest Jackson and Brenna Lee Hobson Budd, Genealogy of the Jackson Family: Their Legendary History from Eleventh Century in England and the Authentic History of Ephraim Jackson, the First Emigrant to America, 1687, and His Descendants to January 1, 1953: A Survey of the Jacksons and Their Kin in America (San Marcos, California: B.H. Budd, 1995).
(3) 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.