Yes, I'm still looking for Francis Marion Langston - was so GLAD for your note. My great was daughter Dora, sister to your Alice (Nancy Alice Langston, right?) She was my grandmother's mom.
Thank you for the name Harey G. Langston (Harry?)... where did you see that... I couldn't find that (but I'll keep looking). All I did find was a "non-pop sched" dated 15 Jun 1880 for Agriculture for Timmonsville, Darlington County, SC for Harry Langston (for a farm with some (not identified) livestock)