Correspondence file of H. Eustace Mitton with W. A. Lee and Evan Williams of the Mining Association of Great Britain on the British Empire Exhibition Including notes on the mining exhibit at Wembley, copy of Professor Poole's layout for the exhibition, loose copy of agreement with Sir Robert McAlpine and Sons Limited, 1923, and loose blueprints (6) for the exhibition colliery, plant and equipment, 1923 Mar 1923-Dec 1924