Agreements, decisions and various documents created or inherited by the Derbyshire Miners' Association (DMA) and National Union of Mineworkers' (NUM) Derbyshire Area - Lease of the Eckington Parkgate and Silkstone Seams of Coal under lands in the parishes of Eckington, Staveley and Killamarsh in the County of Derby (25 March 1886) - High Hazel Price List (12 November 1906) - Mortgage: the Eston Urban District Council of the North Riding of the County of York to the Derbyshire Miners' and Bye Products Workers Union (3 June 1924) - Newspaper article entitled 'Miners Union Pioneers' (12 August 1937) - Price List for High Hazel Seam (2 November 1937) - The Borough of Mitcham and the DMA: deeds relating to a loan of £14,000 (1937; 1978) - Mortgage: the Mayor of Aldermen and Burgesses of the Borough of Chatham to the Derbyshire Miners' Association (27 July 1938) - Holmewood Colloiery No 2 Pit, Threequarters Seam: Machine Mining Price List (7 November 1938) - Trust Deed in relation to the Lynch Superannuation Fund (31 March 1943) - Derbyshire Miners' Welfare Convalescent Home accounts (1943-1944) - NUM Derbyshire Area election of Area Official: declaration of result of poll (1961) - NUM Derbyshire Area election of Area Official: declaration of result of poll (1966) - Exemption of head offices from three-day week regulations concerning electricity for lighting and heating (1974) - Registration of NUM Derbyshire Area: Registrar of Friendly Societies (1974) - Result of coalfield ballot on strike action (17 March 1984) 1886-1984