Thomas William Marley (13 May 1850 – 14 July 1923), chairman and managing director of the North Brancepeth Coal Co. Ltd.,[1] a noted amateur genealogist, and author of a 1919 monograph "The question of the Nationalisation of the Mines". Thomas was the second son of a family of 2 boys and 6 girls of Thomas Marley and Jane Margaret Rayne.[2] He was the nephew of the mining engineer John Marley. Many of his genealogy papers and notebooks are stored by the Northumberland Archives.[3]