"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MVPS-VRG : accessed 13 June 2021), John S Allen, Orosi, Tulare, California, United States; citing enumeration district (ED) ED 194, sheet 7A, family 132, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 110; FHL microfilm 1,374,123.
"California, County Marriages, 1850-1952," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K8DX-TZP : 9 March 2021), John S Allen and Elizabeth Kennedy, 19 Jul 1898; citing Los Angeles, California, United States, county courthouses, California; FHL microfilm 2,579.
See also:
"California Death Index, 1905-1939," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKSM-GZ1G : 23 February 2021), John S Allen, 05 Oct 1934; citing 52617, Department of Health Services, Vital Statistics Department, Sacramento; FHL microfilm 1,686,048.