Williams, C. F. (1897). Genealogical notes of the Williams and Gallup families: Especially relating to the children of Caleb M. and Sabra Gallup Williams, descendants of Robert Williams of Roxbury, and Capt. John Gollop, Sr. of Boston, Mass. Hartford, Conn.: Press of the Case, Lockwood & Brainard Co..

Williams, Charles Fish. Genealogical Notes of the Williams and Gallup Families: Especially Relating to the Children of Caleb M. and Sabra Gallup Williams, Descendants of Robert Williams of Roxbury, and Capt. John Gollop, Sr. of Boston, Mass. Hartford, Conn.: Press of the Case, Lockwood & Brainard Co., 1897.

Williams, Charles Fish. Genealogical Notes of the Williams and Gallup Families: Especially Relating to the Children of Caleb M. and Sabra Gallup Williams, Descendants of Robert Williams of Roxbury, and Capt. John Gollop, Sr. of Boston, Mass. Hartford, Conn.: Press of the Case, Lockwood & Brainard Co., 1897.