Charles was born in 1900. He passed away in 1969 of congestive heart failure and pneumonia.
Sources
"Colorado Statewide Marriage Index, 1853-2006," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KNQZ-QHY : 10 December 2017), C J M D Keller and Dorothy Shryack, 22 Nov 1927, Arriba, Lincoln, Colorado, United States; citing no. 1316, State Archives, Denver; FHL microfilm 1,690,095.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2HB-F3C : accessed 23 March 2020), Charlie J Keller in household of Nathan E Keller, Coldwater, Comanche, Kansas, United States; citing enumeration district (ED) ED 29, sheet 1A, family 4, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 435; FHL microfilm 1,374,448.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MFXL-N3C : accessed 23 March 2020), Charle Keller in household of Nathaniel E Keller, Lane, Smith, Kansas, United States; citing ED 219, sheet 6B, line 95, family 28, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 552; FHL microfilm 1,820,552.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X746-8QW : accessed 23 March 2020), Charles J Keller, Arriba, Lincoln, Colorado, United States; citing enumeration district (ED) ED 8, sheet 3B, line 94, family 86, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 246; FHL microfilm 2,339,981.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VR6J-5BM : 28 February 2020), Charles J Keller, Arriba, Election Precinct 6, Lincoln, Colorado, United States; citing enumeration district (ED) 37-7, sheet 2B, line 47, family 45, 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 469.
Find A Grave: Memorial #11441073, Bear Canon Cemetery, Sedalia, Colorado
Monumental inscription. United States. Bear Canon Cemetery, Sedalia, Colorado. 1969 (b. 1900) KELLER, CHARLES J. M.D. GPS: n/a. Photo courtesy of Archives & Local History, Douglas County Libraries, Castle Rock, CO.
Douglas County News, 6 Nov 1969, Colorado Historic Newspapers Collection, Colorado State Library, Dr C J Keller Obit
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