Hi Bee, Do you have any birth or death dates for Drusilla Calhoun?Do you know who Drusilla's mother was?If Drusilla's mother was Margaret, then I think I am on the right track.
Here is some Census data that might interest you.
In the 1850 Census from Montgomery, GA the following is listed: Margaret Calhoun (age 36) Husband John Calhoun died abt. 1849 Children:James (b. 1837), William Alexander (b.1839), Margaret E. (b. 1846) and Dewsilla (b. 1849) They were living with Thomas and Penelope Calhoun Darley.
In the 1860 Census from Montgomery, GA the following is listed: Margaret Calhoun (35) James Calhoun (22) Alexander Calhoun (20) Mary E. Calhoun (13) Drusilla Calhoun (11) They were living with Patrick Hall (51) and he was a farmer.
In the 1870 Census (Montgomery, GA) only Margaret (52) and Drusilla (17) were listed living with Patrick Hall (70).
I couldn't find them in the 1880 nor the 1890 Census, but they showed up in the 1900 Census from Emanuel, GA.
James and Drusilla were married on July 23, 1885.
1900 Census from Emanuel, GA James Warren (79) Drucilla Warren (49) Bessie Lee Warren (says 8 yrs. old, but I think she was 4) James L. Warren (16) Joseph Warren (13)
1910 Census from Emanuel, GA Drusilla Warren (56) widowed James L. Warren (24) Bessie Lee Warren (16)
Bessie Warren married Melvin Leroy Hair abt. 1918.
I haven't done a thorough search yet on the listing of households for the 1920 and 1930 Census.
1920 Census from Barnwell, SC Bessie Warren Hair (22)
1930 Census from Orange, FL Bessie Hair (34)
I hope this information is helpful to you and in your search if you can provide additional info, I would be grateful.If we are researching the same Drusilla, then we are related.