Ernest L. Ahrons

right Ernest Leopold Ahrons (12 February 1866 – 30 March 1926) was a British engineer and author. He is most noted for his magnum opus, ''The British Steam Railway Locomotive 1825–1925'', published posthumously in book form, and for a series originally published in ''The Railway Magazine'' "Locomotive and train working in the latter part of the nineteenth century". Provided by Wikipedia