George M. Brinson of Brinson Railroad

Does anyone have information about George M Brinson's line? He was the founder of Brinson Railroad. I believe that my great grandfather (John Thomas Brinson b. 4-22-1884) and great-great grandfather (Adam Mills Brinson b. 10-19-1845)had involvement with the Railroad. I am trying to determine the extent of their involvement or if they were directly related to George M. Any help would be greatly appreciated.

Annie Brinson