"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M8FB-JR9 : 17 October 2014), Charles Neumann in household of Caspar Neumann, New York, United States; citing p. 293, family 2490, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,432
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZZT-8TM : 11 July 2016), Casper Newman, West Seneca, Erie, New York, United States; citing enumeration district ED 108, sheet 243A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0827; FHL microfilm 1,254,827.
Research notes
The 1870 census lists the mother as Catrina, probably wrong
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