"Massachusetts, Town Clerk, Vital and Town Records, 1626-2001," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:FHWZ-4LF : 4 November 2017), Prentice Billings and Betsey Crosman, 09 Jan 1809; citing Marriage Notice, Sutton, Worcester, Massachusetts, United States, Massachusetts Secretary of the Commonwealth, Boston; FHL microfilm 007009440.
"Massachusetts Births and Christenings, 1639-1915", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4VG-FGM : 10 December 2019), Betsey Billings in entry for Adaline Billings, 1812.
"Massachusetts Births and Christenings, 1639-1915", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4VG-FG3 : 10 December 2019), Betsey Billings in entry for Otis Billings, 1815.
"Massachusetts Births and Christenings, 1639-1915", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4VG-FGW : 10 December 2019), Betsey Billings in entry for Alexander Linus Billings, 1817.
"Massachusetts Births and Christenings, 1639-1915", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4VG-FGC : 10 December 2019), Betsey Billings in entry for Franklin Prentice Billings, 1819.
"Massachusetts Births and Christenings, 1639-1915", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4VG-JTP : 10 December 2019), Betsey Billings in entry for Henry Monroe Billings, 1828.
"Massachusetts, Town Clerk, Vital and Town Records, 1626-2001," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:FHFF-CLN : 4 November 2017), Betsey Billings in entry for Otis - Aka Lysander W. Henderson Billings, 21 Jun 1837; citing Death, Sutton, Worcester, Massachusetts, United States, Massachusetts Secretary of the Commonwealth, Boston; FHL microfilm 007009440.
"Massachusetts Deaths, 1841-1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:N7G3-7YX : 22 May 2019), Betsey Billings, 28 Sep 1859; citing Sutton, Massachusetts, v 131 p 157, State Archives, Boston; FHL microfilm 960,175.
"Massachusetts Deaths, 1841-1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:N7JW-NVG : 22 May 2019), Betsey Grossman in entry for Alexander L. Billings, 23 Aug 1863; citing Sutton, Massachusetts, v 167 p 283, State Archives, Boston; FHL microfilm 960,183.