The Great Eastern Railway was formed on 1 August 1862, when the Eastern Counties Railway changed its name. The ECR had originally been built to 5 ft (1,524 mm) gauge, was converted to 4 ft 8+1⁄2 in (1,435 mm) standard gauge in September and October 1844.[1]
^"holdenf5.co.uk". The Holden F5 Locomotive Trust. Retrieved 10 November 2019.
Baxter, Bertram (2012). Baxter, David; Mitchell, Peter (eds.). British Locomotive Catalogue 1825–1923, Volume 6: Great Eastern Railway, North British Railway, Great North of Scotland Railway, Midland & Great Northern Joint Railway, remaining companies in the LNER group. Southampton: Kestrel Railway Books. ISBN978-1-905505-26-5.
Boddy, M. G.; Brown, W. A.; Fry, E. V.; Hennigan, W.; Hoole, Ken; Manners, F.; Neve, E.; Platt, E. N. T.; Proud, P.; Yeadon, W. B. (March 1975). Fry, E. V. (ed.). Locomotives of the L.N.E.R., Part 2B: Tender Engines—Classes B1 to B19. Lincoln: RCTS. ISBN0-901115-73-8.
Boddy, M. G.; Brown, W. A.; Fry, E. V.; Hennigan, W.; Manners, F.; Neve, E.; Tee, D. F.; Yeadon, W. B. (April 1968). Fry, E. V. (ed.). Locomotives of the L.N.E.R., Part 4: Tender Engines—Classes D25 to E7. Kenilworth: RCTS. ISBN0-901115-01-0.{{cite book}}: CS1 maint: year (link)
Fry, E. V., ed. (September 1966). Locomotives of the L.N.E.R., Part 5: Tender Engines—Classes J1 to J37. Kenilworth: RCTS. ISBN0-901115-12-6.