"United States Census, 1850," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MWZN-3NZ : 22 December 2020), Samuel Swett in household of Samuel Swett, Manchester, Hillsborough, New Hampshire, United States; citing family , NARA microfilm publication (Washington, D.C.: National Archives and Records Administration, n.d.).
"Massachusetts State Vital Records, 1841-1920", database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:N4SD-919 : 10 November 2022), Saml. D. Sweatt in entry for Charles W. Gerrish and Ella M. Sweatt, 1877.
"United States Census, 1880," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MH6T-ZCQ : 14 January 2022), Samuel D. Sweatt, Westford, Middlesex, Massachusetts, United States; citing enumeration district , sheet , NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm .
"Massachusetts, Town Clerk, Vital and Town Records, 1626-2001," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:QPCF-XCGF : 11 May 2022), Samuel D in entry for Fred A Sweatt and Edith E Lewis, 28 Oct 1885; citing Marriage, Westford, Middlesex, Massachusetts, United States, Massachusetts Secretary of the Commonwealth, Boston; FHL microfilm 007011243.