"United States Census, 1870," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MN6P-ZFP : accessed 03 Jan 2014), Francis Hall in household of Margaret Hall, California, United States; citing p. , family 2233, NARA microfilm publication M593, FHL microfilm 000545578.
"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M6PX-4MC : accessed 03 Jan 2014), Francis Hall in household of Charles Cook, San Francisco, San Francisco, California, United States; citing sheet 72B, family 2, NARA microfilm publication T9-0078