| Sources |
- [S72213] Obituary, The Oregonian, William P. Jenkins, (November 8, 1937).
- [S53634] Death index, California, (Ancestry.com. California, Death Index), Name: Francis Summers Jackson Social Security #: 563528952 Gender: Male Birth Date: 13 Oct 1899 Birth Place: Oregon Death Date: 11 Aug 1987 Death Place: San Diego Mother's Maiden Name: Weed (Reliability: 3).
- [S36677] 1930 census, California, San Diego county, Year: 1930; Census Place: San Diego, San Diego, California; Page: 17A; Enumeration District: 0108 (Reliability: 3).
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