"Indiana Marriages, 1811-2019," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:QVM1-DFMY : 31 December 2021), Wilhelm Schmidt and Caroline M Gick, 15 Jun 1875; citing Allen, Indiana, United States, Marriage License, Indiana Commission on Public Records, Indianapolis; FHL microfilm 004165038.
"United States Census, 1880," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MHMZ-NX7 : 13 January 2022), Caroline Smith in household of William Smith, Fort Wayne, Allen, Indiana, United States; citing enumeration district ED 120, sheet , NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKLT-723 : accessed 1 March 2022), Caroline Schmidt in household of William Schmidt, Fort Wayne Ward 8, Allen, Indiana, United States; citing enumeration district (ED) ED 56, sheet 19A, family 336, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 339; FHL microfilm 1,374,352.