"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKDV-Q32 : accessed 25 April 2020), Belle Pruitt in household of Lee Pruitt, Elvira, Johnson, Illinois, United States; citing enumeration district (ED) ED 60, sheet 12A, family 257, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 295; FHL microfilm 1,374,308.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJ4X-FP6 : accessed 25 April 2020), Belle Pruitt in household of Lou Pruitt, Elvira, Johnson, Illinois, United States; citing ED 74, sheet 12A, line 6, family 243, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 376; FHL microfilm 1,820,376.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X394-84L : accessed 25 April 2020), Belle Prewitt in household of Lee Prewitt, Herrin, Williamson, Illinois, United States; citing enumeration district (ED) ED 45, sheet 5A, line 8, family 96, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 570; FHL microfilm 2,340,305.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KWTW-Y65 : 26 January 2020), Belle Prewitt, Ward 1, Herrin, Herrin Election Precinct, Williamson, Illinois, United States; citing enumeration district (ED) 100-2, sheet 1B, line 69, family 19, 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 910.
"Illinois Deaths and Stillbirths, 1916-1947," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N3W8-1QJ : 9 March 2018), Mary Belle Prewitt, 10 Jan 1946; Public Board of Health, Archives, Springfield; FHL microfilm 1,991,236.
Find a Grave, database and images ( : accessed 25 April 2020), memorial page for Blanche Prewitt (1875–1946), Find A Grave: Memorial #117776869, citing Pleasant Grove Cemetery, Pleasant Grove, Johnson County, Illinois, USA ; Maintained by ejeCarman (contributor 47836539) .
"Illinois Deaths and Stillbirths, 1916-1947," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N312-K4N : 8 March 2018), Mary Bell Tripp in entry for Hobert Prewitt, 08 Nov 1947; Public Board of Health, Archives, Springfield; FHL microfilm 1,991,970.
All the information I have on all ancestors of Ralph Prewitt and Clara Ruth Broadway Eckstein Prewitt was given to me by Clara Ruth before she passed away.