Isaac was born in 1849. He is the son of James Terry.
"New York State Census, 1865," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVNV-N5FK : 12 March 2018), James Terry, District 05, Southampton, Suffolk, New York, United States; citing Census, p. 18, 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, 1870", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M8KL-D52 : 18 March 2020), James Terry, 1870.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZN9-S59 : 20 August 2017), Arthur D Gann in household of James Terry, Good Ground, Suffolk, New York, United States; citing enumeration district ED 328, sheet 481B, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,935.
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