"Canada Census, 1881," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MV6F-WTM : 4 October 2018), John C. Sinclair in household of John C. Sinclair, Bathurst, Gloucester, New Brunswick, Canada; from "1881 Canadian Census." Database with images. Ancestry. (www.ancestry.com : 2008); citing John C. Sinclair, citing Library and Archives Canada, Ottawa, Ontario.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSSK-N97 : accessed 7 November 2018), John C Sinclair in household of Emily Sinclair, Precinct 18 South Town Chicago city Ward 2, Cook, Illinois, United States; citing enumeration district (ED) 49, sheet 11A, family 154, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,246.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKHR-CKT : accessed 7 November 2018), John Sinclair in household of Emily Sinclair, Chicago Ward 2, Cook, Illinois, United States; citing enumeration district (ED) ED 176, sheet 9B, family 181, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 242; FHL microfilm 1,374,255.
"Illinois, Cook County Marriages, 1871-1920," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N7D1-CJX : 10 March 2018), John C. Sinclair and Gertrude Lapean, 29 Apr 1911; citing Chicago, Cook, Illinois, 562731, Cook County Courthouse, Chicago; FHL microfilm 1,030,498.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJSR-J61 : accessed 7 November 2018), John C Sinclair, Chicago Ward 6, Cook (Chicago), Illinois, United States; citing ED 373, sheet 8A, line 8, family 177, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 310; FHL microfilm 1,820,310.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KWYC-J97 : 14 March 2018), John C Sinclair in household of Byran Carlile, Ward 8, Chicago, Chicago City, Cook, Illinois, United States; citing enumeration district (ED) 103-545, sheet 8B, line 58, family 302, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 938.
"Illinois, Cook County Deaths, 1878-1994," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVRN-777H : 16 March 2018), John C Sinclair, 19 Nov 1957; citing Chicago, Cook, Illinois, United States, source reference , record number , Cook County Courthouse, Chicago; FHL microfilm. Parents JC Sinclair, Emily Byron; informant A Knipper.
Ancestry.com. 1940 United States Federal Census [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2012.
Original data: United States of America, Bureau of the Census. Sixteenth Census of the United States, 1940. Washington, D.C.: National Archives and Records Administration, 1940. T627, 4,643 rolls.
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