In the 1850 US Census for Danbury, Fairfield, Connecticut the family of Maria (Knapp) Barnum was enumerated with the family of her son-in-law and daughter, James W. and Anna Porter, as follows:
Dwelling #531; Family #627
James W. Porter, 40, M, Merchant, Real property $2,000, b. Connecticut
Anna Porter, 28, F, b. Connecticut
Orlando H. Porter, 16, M, b. Connecticut, Attended school within the year
Maria Barnum, 56, F, b. Connecticut
Cynthia Barnum, 36, F, b. Connecticut
N. K. Barnum, 25, M, Merchant, b. Connecticut