"United States Census, 1850," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MCBS-296 : 23 December 2020), Richard Barnum, Mendon, Monroe, New York, United States; citing family , NARA microfilm publication (Washington, D.C.: National Archives and Records Administration, n.d.).
"New York State Census, 1865," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVNN-Y5DB : 8 March 2021), Wm Barnum, District 01, Mendon, Monroe, New York, United States; citing Census, p. 10, citing multiple county Clerks; Warren and Lewis County Board of Supervisors; multiple counties in New York; Utica and East Hampton Public Libraries, New York.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZDX-MLQ : 19 February 2021), Wm M Barnum, Mendon, Monroe, New York, United States; citing enumeration district ED 52, sheet 239A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,861.
Find a Grave, database and images (https://www.findagrave.com/memorial/36925965/william-barnum : accessed 03 September 2021), memorial page for William Barnum (1838–1902), Find a Grave Memorial ID 36925965, citing Honeoye Falls Cemetery, Honeoye Falls, Monroe County, New York, USA ; Maintained by Russ Pickett (contributor 46575736) .
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