"United States Census, 1880," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MFN2-TMK : 15 January 2022), Girtrude Sims in household of James Sims, Justice Precinct 7, Hopkins, Texas, United States; citing enumeration district , sheet , NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm .
"Texas Deaths, 1890-1976," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K3XY-4JP : 20 February 2021), James Marion Sims in entry for Gertrude Sims Graves, 23 Mar 1966; citing certificate number 17702, State Registrar Office, Austin; FHL microfilm 2,117,974.
Find a Grave, database and images (https://www.findagrave.com/memorial/8935397/gertrude-graves : accessed 20 June 2022), memorial page for Gertrude Sims Graves (18 Jan 1874–23 Mar 1966), Find a Grave Memorial ID 8935397, citing East Mount Cemetery, Greenville, Hunt County, Texas, USA ; Maintained by John Armstrong (contributor 46567031) .
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