"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNSL-146 : 14 July 2016), Walter Darling in household of Ned E Darling, Lehi, Utah, Utah, United States; citing enumeration district ED 87, sheet 263C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1338; FHL microfilm 1,255,338.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMRR-BWB : 22 January 2015), Walter Darling, Lehi Precinct Lehi city Ward 1-3, Utah, Utah, United States; citing sheet 6B, family 124, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,241,687.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M8P2-T4T : 14 December 2015), Walter Darling, Lehi Ward 1, Utah, Utah, United States; citing sheet 7A, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,821,868.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VT4Z-X2T : accessed 9 November 2016), Walter Darling, Ward 2, Spanish Fork, Spanish Fork Election Precinct, Utah, Utah, United States; citing enumeration district (ED) 25-62, sheet 81A, family 208, 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 4220.
"United States World War I Draft Registration Cards, 1917-1918," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:29J9-RYM : 12 December 2014), Walter Darling, 1917-1918; citing Utah County, Utah, United States, NARA microfilm publication M1509 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,984,056.
"Utah Marriages, 1887-1935," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F8P5-Z96 : 5 December 2014), Walter Darling and Miss Stina Christiansen, 10 Sep 1894; citing Lehi City, Utah, Utah; FHL microfilm 488,400.