He represented Oxford South in the Legislative Assembly of Ontario from 1908 to 1914 as a Liberal.
[1][2][3] The son of Richard Mayberry and Matilda Sibbald, he was born in Salford, Dereham township.
[1] Mayberry was secretary and manager for the Dereham and West Oxford Mutual Fire Insurance Company.
[1] During World War I, he was lieutenant-colonel commanding the 24th Grey's Horse Regiment.
[3] In 1908, Mayberry defeated Donald Sutherland to win a seat in the Ontario assembly.