Butterley Company correspondence file on the workings of coal using the Ripley and Hartshay leases from Mr Hunter and Mr Topham originally drawn up in 1916 Comprising correspondence on the Ripley and Hartshay lease, May 1920-June 1922, and on the Ripley lease only, Sep 1938. Includes the rent due from these leases and extract of draft terms. Mentions the Trefor Belgian Boring and Sinking Company with regard to Upper Hartshay Colliery, which one letter states was going to be closed on 11 July 1922 . May 1920-Sep 1938