"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M6VZ-Z22 : 12 April 2016), Charles Ingalls in household of Eben S Hanscom, East Machias, Washington, Maine, United States; citing family 157, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
Son's death record names parents:
"Minnesota, Birth and Death Records, 1866-1916," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XPDY-1PD : 10 March 2018), Charles Ingalls in entry for Charles Oscar Ingalls, 01 Jan 1914; citing Minneapolis, Hennepin, Minnesota, cn 10, Public Health Center, St. Paul; FHL microfilm 1,499,058.
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