Mails under London by L C Stanway (2000).

The history of the carriage of mails by rail under the streets of London by the Pneumatic Despatch Company, the Post Office Railway and by the London Underground companies. Includes details of stamps and other philatelic material. 56 pages, 17 plates, line diagrams of rolling stock. Paperback ISBN 978-0-9535398-1-9. £9.50

Mails under London by L C Stanway (2000).