↑ "United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M6DS-WL4 : 12 April 2016), Welton Spring in household of Eli Campbell, Granby, Hartford, Connecticut, United States; citing family 9, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
↑ 3.03.1 "United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN78-9QR : 12 April 2016), Charles W Spring, Connecticut, United States; citing p. 94, family 827, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 545,602.
↑ 4.04.14.2 Frederic Clarke Jewett (1908). "History and genealogy of the Jewetts of America; a record of Edward Jewett, of Bradford, West Riding of Yorkshire, England, and of his two emigrant sons, Deacon Maximilian and Joseph Jewett, settlers of Rowley, Massachusetts, in 1639; also of Abraham and John Jewett, early settlers of Rowley, and of the Jewetts who have settled in the United States since the year 1800," p. 840. Retrieved 10 February 2019 by Clare Spring from https://archive.org/details/historygenealogy03jewe/page/840.