Locomotive test report, London Midland & Scottish Railway Report, locomotive classes superheated 5F 0-8-0 No. 574 (renumbered 9422), superheated 4F 0-6-0 No. 3866, saturated 3F No. 3756, performance and efficiency: comparison of three types of freight engine, September 1925, Derby, 11 pages of text, 2 diagrams, 1 table. (NRM Technical Archive reference TEST/LMS/11)