
Locomotive test report, London Midland & Scottish Railway Report No. 33
Locomotive test report, London Midland & Scottish Railway Report No. 33, locomotive class Royal Scot 4-6-0 No. 6158, performance and efficiency of reducing boiler pressure, June 1931, Derby, 11 pages of text, 3 diagrams, 1 table. (NRM Technical Archive reference TEST/LMS/20)