Aerial Photo of Bryan county 5 South - 9 East Section 18 This is across Blue river from Nail Cemetery and a little south. Do you see the fort?
http://www.terraserverusa.com/image.aspx?T=1&S=10&Z=14&X=3702&Y=18894&W=3&qs=%7cdurant%7cok%7c
Elmer