"New York State Census, 1865," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVNV-NW7L : 12 March 2018), Nathan N Tiffany in household of Mary A Tiffany, District 05, Southampton, Suffolk, New York, United States; citing Census, p. 125, 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:MZNM-Y1V : 20 August 2017), Nathan N Tiffany, Bridgehampton, Suffolk, New York, United States; citing enumeration district ED 327, sheet 439B, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,935.
Find A Grave, database and images (https://www.findagrave.com : accessed 06 March 2020), memorial page for Nathan N Tiffany (17 Mar 1812–29 Apr 1882), Find A Grave: Memorial #34107049, citing Bridgehampton Cemetery, Bridgehampton, Suffolk County, New York, USA ; Maintained by Fred Saar (contributor 46511066) .