Census data:
United States Census, 1850 Cambridge, Middlesex, Massachusetts "United States Census, 1850," database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:MDS3-WX9 : 4 April 2020), Benjamin F Roberts, Cambridge, Middlesex, Massachusetts, United States; citing family 1054, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
Massachusetts State Census, 1855 Somerville, Middlesex, Massachusetts "Massachusetts State Census, 1855," database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:MQ49-LWD : 11 March 2018), Benjn F Roberts, Somerville, Middlesex, Massachusetts, United States; State Archives, Boston; FHL microfilm 953,951.
United States Census, 1860 Chelsea, Suffolk, Massachusetts "United States Census, 1860", database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:MZCL-KPT : 19 March 2020), Benj F Roberts, 1860.
Massachusetts State Census, 1865 Boston, Suffolk, Massachusetts "Massachusetts State Census, 1865", database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:MQH4-DKM : 1 June 2018), Benj F Roberts, 1865.
United States Census, 1870 Boston, Suffolk, Massachusetts "United States Census, 1870", database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:MD3K-XSW : 19 March 2020), Benj F Roberts, 1870.
United States Census, 1880 Boston, Suffolk, Massachusetts "United States Census, 1880," database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:MHXV-8X2 : 12 August 2017), Adline Roberts in household of Bengamin Roberts, Boston, Suffolk, Massachusetts, United States; citing enumeration district ED 635, sheet 189B, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,554.