I checked part of the first page of maps for Choctaw County. Have not found Buckluxy yet. But did find.
Court Grounds - Township 5 South - Range 14 East - South East Quarter of Section 6
Nelson P.O. - Township 5 South - Range 15 East - Soth Half of Section 12 - About 10 buildings
Spencer Academy - Township 5 South - Range 16 East - On the south line of Section 18 - Shows 3 buildings
Town of Hamden - Township 5 South - Range 17 East - In the south half of section 6 - St. Louis and San Francisco RR runs through the middle of town.