Dempster Brothers, Inc. was founded by George Roby Dempster and John Dempster and their brother, who often staged political battles. The brother and the eccentric Knoxville businessman were born in 1902.
 Dempster also served as a city manager and mayor of Knoxville, where he became legendary for his political battles with eccentric Knoxville businessman Cas Walker and "Knoxville Journal" editor Guy Smith, Jr. 
Orton Caswell "Cas" Walker (March 23, 1902  September 25, 1998), was a Tennessee businessman, politician, and personality on television and radio. 
 The firm was originally established by George Roby Dempster with his brothers Thomas and John Dempster. 
