In the 1880 Federal Census at Hartland, Windsor, VT, Ozro is age 56, a widower, and living with him is son Edwin, 15.
According to the death record (per verification from Harry Kivler), Ozro's death record states that he died 8 May 1901, 76 y 5 m 11 d. However, a descendant (Beatrice Cushman Dana) says Ozro was a twin to Oscar; but there is a discrepancy in the ages given.