Correspondence file on the visit by H. E. Mitton to inspect the Snowdown and Betteshanger Collieries, Kent, on 19 May 1927 Including copies of notes on previous visits to the two collieries, 26-28 Aug 1926. The two collieries were owned by Pearson and Dorman Long Limited. The visit may have taken place due to his involvement with the Institution of Mining Engineers. May 1927