I found these 3 census records at FamilySearch.org and you can see the actual census records there. Feel free to add them to Ernest's profile.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M5DB-L2L : 29 October 2015), Ernest D Sperman in household of Andrew F Sperman, Williamston, Anderson, South Carolina, United States; citing enumeration district (ED) ED 69, sheet 24B, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,375,462.
"United States Census, 1930", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:SPHV-WY7 : 8 December 2015), Dean E Spearman in entry for Andrew F Spearman, 1930.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K48C-HFQ : 17 May 2014), Ernest Dean Spearman, Brushy Creek Township, Anderson, South Carolina, United States; citing enumeration district (ED) 4-20, sheet 6B, family 100, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 3786.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:J2XZ-64M : 20 May 2014), Ernest Spearman, Apr 1982; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).