In the 1850 Census for Greenport, Columbia County, New York the family of Erasmus/Erastus Barnum [here called Erasmus] was enumerated as follows:
Dwelling #71; Family #78
Erasmus Barnham, 26, M, Boatman, b. New York
Maria Barnham, 25, F, b. New York
Jane M. Barnham, 3, F, b. New York
Abram E. Barnham, 1, M, b. New York
Hannah Eaton, 30, F, b. New York
In the 1860 US Census for Cue, Benton County, Iowa the family of Erasmus/Erastus Barnum was enumerated as follows:
Dwelling #1363; Family #1243
Erastus Barnum 38, M, Farmer, Real property $265, b. New York
Mariah Barnum, 36, F, b. New York
Jane M. Barnum 13, F, b. New York, Attended school within the year
Abram E. Barnum 12, M, b. New York, Attended school within the year
Ann A. Barnum 11, M [sic], b. New York, Attended school within the year
William Barnum 7, M, b. New York, Attended school within the year
Henry Barnum 4, M, b. New York, Attended school within the year
Margarett [sic] E. Barnum 1, F, b. Iowa
Hannah Eaton, 40, F, b. New York
In the 1870 US Census Hudson Ward 2, Columbia County, New York the family of Erasmus/Erastus Barnum was enumerated as follows:
Dwelling #1; Family #1
Barnum, Erasmus; 49; M; W; Grocer (ret.); Real property $42,000; b. New York; Male citizen of US of 21 years of age and upwards
Barnum, Maria; 47; F; W; Keeping house; b. New York
Barnum, Margaret; 12; F; W; b. Iowa; Attended school within the year
Barnum, Hannah; 10; F; W; b. Iowa; Attended school within the year
Barnum, Ida; 7; F; W; b. Iowa; Attended school within the year
Barnum, John; 3; M; W; b. Iowa