Heywood, William Sweetzer, History of Westminster, Massachusetts: (first named Narragansett no. 2) from the date of the original grant of the township to the present time, 1728-1893: with a biographic-genealogical register of its principal families, Lowell, MA, Vox Populi Press, S.W. Huse & Co., 1893. Online: Ancestry.com.