"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MDJC-1TV : 4 April 2020), Willis Potter, Newport, Newport, Rhode Island, United States; citing family 621, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.)
"Massachusetts State Census, 1855," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MQ45-V2Q : 11 March 2018), Willis Potter, Taunton, Bristol, Massachusetts, United States; State Archives, Boston; FHL microfilm 953,977.