'LETTERS IN TRANSIT BRITAIN ADVANCES' BY FRANK SINGLETON. A good copy of this 1939? pamphlet (34 pages), some damage but excellent text on postal procedures with total number of items mailed being 6,000,000,000, with split between the various parts of the UK, also details on various aspects such as postal sorting, T.P.O's and Airgraphs. 28 fine and interesting contemporary illustrations. (Ref 115937).