All-Up Air Mail, by J C W Field.

Published by House of Antiquity.  S/B, 23pp.

A booklet on the 'all-up' mail service - the delivery of unsurcharged first class mail by air within the United Kingdom and to Europe and the Empire.  A reprint of an article originally published in The Aero Field in 1978.  Examples of covers, letters, and postcards are illustrated in black and white.