I can't seem to pin down James M. Dalrymple, I assume census index has done wonders with the spelling of his name, and the one I use has to match exactly.
1850 census Shelby Co, AL:
Dalrymple, Lewis, 59, b SC " Martha, 35, b SC " Charles, 21, b AL " Thomas H., 19, b AL " Lewis W., 14, b AL " Melissa A., 10, b AL
This looks like Charles from above on the 1880 census Hunt Co, TX, so some of those AL Dalrymples went to TX:
Charles DALRYMPLESelfWMaleW51ALFarmerSCSC Louis T. DALRYMPLESonSMaleW21ALFarmerALAL Melissa M. DALRYMPLEDauSFemaleW18ALHousekeeperALAL Margaret V. DALRYMPLEDauSFemaleW16ALAsst. HousekeeperALAL Charles N. DALRYMPLESonSMaleW8ALALAL Albert M. DALRYMPLESonSMaleW7ALALAL Wilburn THIRSTONSSonSMaleW19ALAt HomeALAL