The railway revolution; a study of the early railways of the Great Northern Coalfield, 1605–1830: by Les Turnbull, Newcastle, North of England Institute of Mining and Mechanical Engineers in association with The Newcastle upon Tyne Centre of the Stephenson Locomotive Society, 2019, 172 pp., 165 illus., £15 (pb), ISBN: 978-0-9931151-5-8. (2nd July 2020) - Gwyn, David