Henry was born in 1881. He passed away about 1960.
Sources
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJMR-6D4 : accessed 4 September 2017), Henry Blankenship, Altus, Jackson, Oklahoma, United States; citing ED 99, sheet 2B, line 87, family 44, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1457; FHL microfilm 1,821,457.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XCQT-9C3 : accessed 4 September 2017), Henry Blankenship, Longdale, Blaine, Oklahoma, United States; citing enumeration district (ED) ED 23, sheet 1B, line 99, family 30, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1893; FHL microfilm 2,341,627.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VBVH-218 : accessed 4 September 2017), Henry W Blankenship, Ward 1, Altus, Altus City, Jackson, Oklahoma, United States; citing enumeration district (ED) 33-2, sheet 6B, line 73, family 148, 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 3299.
"United States World War I Draft Registration Cards, 1917-1918," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KZDJ-5F9 : 12 December 2014), Henry Walter Blankenship, 1917-1918; citing Jackson County, Oklahoma, United States, NARA microfilm publication M1509 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,851,782.
"United States World War II Draft Registration Cards, 1942," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XPYZ-Q2P : 19 April 2016), Henry Walter Blankenship, 1942; citing NARA microfilm publication M1936, M1937, M1939, M1951, M1962, M1964, M1986, M2090, and M2097 (Washington D.C.: National Archives and Records Administration, n.d.).
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