In the 1850 US Census for Killingworth, Middlesex County, Connecticut the family of Mabel Barnum (widow) was enumerated as follows:
Dwelling #197; Family #225
Mabel Barnum, 87, F, Real property $300
Aaron S. Barnum, 42, M, Drover, Real property $1,000, b. New York
Dwelling #197; Family #226
Henry P. Barnum, 40, M, Real property $750, b. New York
Huldah Barnum, 40, F, b. New York
Anginette E. Barnum, 13, F, Attended school within the year
Mabel R. Barnum, 11, F, Attended school within the year
Henry E. Barnum, 10, M, Attended school within the year
[Note; Mabel's eldest son, Nathaniel E. Barnum, was living nearby].