Certificates of Jonathan Walls, Station Master, Silecroft: for passing examinations in Block Telegraph Regulations and Signalling Arrangements, issued by the School of Signalling, Barrow, for the London Midland & Scottish Railway, 1924-1929 [5 items]; for passing examinations in Train Signalling by Block Telegraph, issued by the London Midland & Scottish Railway Company [2 items]; recording his service during the General Strike in May 1926, issued by the London Midland & Scottish Railway Company [1 item].