In the 1850 US Census for Stockbridge, Berkshire County, Massachusetts the family of Fidelia Barnum was enumerated as follows:
Dwelling #165; Family #177
Delia Barnum, 53, F, b. Massachusetts
Jane L. Barnum, 18, F, b. Massachusetts
Lucy Barnum, 9, F, b. Massachusetts, Attended school within the year
John Barnum, 3/12, M, b. Massachusetts
William S. Barnum, 20, M, Tinner, b. Massachusetts
[N.B., The occupation "Tinner" probably means tinsmith, although tin miner is another possibility].