I found Belle with her husband in the 1900 census but haven't found her in 1880 as a child. There is a large ink blot over the column that shows the month of birth so I can't make it out.

Source Citation: Year: 1900
Census Place: Greenville, Madison, Florida
Roll T623_173; Page: 7A; Enumeration District: 96

Lee Callahan, Head, 28, b. Dec? 1872, married 8 yrs., b. FL, parents b. FL, Farmer
Belle Callahan, Wife, 26, b. ??? 1873, mother of 4 children, 3 living, b. FL, parents b. FL, Cook
Hardy Callahan,m Son, 5, b. Feb 1895, FL
Dannette Callahan, Son, 1, b. June 1898, FL
George Callahan, Son, 1, b. May 1898, FL