In the 1850 US Census for Gouverneur, Saint Lawrence County, New York the family of Ossian Barnum was enumerated as follows:
Dwelling #432; Family #445
Ossian L. Barnum, 35, M, Farmer, Real property $1000, b. New York
Tabith Barnum, 33, F, b. New York
Emily Barnum, 13, F, b. New York, Attended school within the year
Amelia Barnum, 11, F, b. New York, Attended school within the year
Martha Barnum, 8, F, b. New York, Attended school within the year
Leslie Barnum, 6, M, b. New York, Attended school within the year
Ossian Barnum, M, 3, b. New York
Ruby Barnum, 1, F, b. New York
1860 Census, Gouverneur, Saint Lawrence County, New York, Page 708, Household 276-316
Barnum, Osian, 44, farmer, $2075, $890, New York
Barnum, Tabitha, 43, New York
Barnum, Amelia M., 20, New York
Barnum, Martha L., 17, New York
Barnum, Leslie W., 15, New York
Barnum, Ossian B., 13, New York
Barnum, Ruby J., 11, New York
Barnum, George J., 9, New York
Barnum, Keron J., 1, New York
1870 Census, Hermon, Saint Lawrence County, New York, Page 323a, Household 148-146
Barnum, Ossian, 54, farmer, $16000, $4700, New York
Barnum, Tabitha, 52, keeping house, New York
Barnum, Amelia, 31, housekeeper, New York
Barnum, Ossian B., 23, work on farm, New York
Barnum, Ruby J., 21,, at home, New York
Barnum, George J., 19, works on farm, New York
Barnum, Keron J., 16, at home, New York
1880 Census, Hermon, Saint Lawrence County, New York, Page 285a, Household 195-215
Barnum, Ossian, 64, farmer, New York, Unknown, Unknown
Barnum, Tabitha, 63, wife, keeping house, New York, New York, New York
Barnum, Amelia M., 35, daughter, at home, New York, New York, New York
Barnum, Ossian D., 32, son, works on farm, New York, New York, New York
Barnum, Ruby J., 29, daughter, at home, New York, New York, New York
Barnum, Kerin J., 25, daughter, at home, spinal difficulty, New York, New York, New York
Bush, Alfred, 25, servant, New York, New York, New York
His death date is based on the date of the 1880 Census.