Source Information
Ancestry.com. Isaac Cummings of Topsfield, Mass., and some of his descendants [database on-line]. Provo, UT: Ancestry.com Operations Inc, 2004.Original data: Clark, Marietta.. Isaac Cummings of Topsfield, Mass., and some of his descendants. Hartford Conn.: Press of the Case, Lockwood & Brainard Co., 1987.
