Locomotive test report, London Midland & Scottish Railway, Royal Scot 4-6-0 No. 6100 (LMS) and Great Western Railway Castle 4-6-0 No. 5000
Locomotive test report, London Midland & Scottish Railway Report No.?, locomotive class Royal Scot 4-6-0 No. 6100 (LMS) and Great Western Railway Castle 4-6-0 No. 5000, performance and efficiency: comparison with GWR Castle class, November 1927, Derby, 9 pages of text. (NRM Technical Archive reference TEST/LMS/20)