Butterley Company correspondence file on the arbitration award under the Midland (Amalgamated) District (Coal Mines) Scheme 1930 Including a copy of the 1936 award, called the Bestwood Arbitration on the front of the file, involving non-special mines in the Derbyshire and Nottinghamshire Section, 8 Apr 1936, with related correspondence and papers May 1935-May 1936