Postcard hidden inside newspaper
Bray developed a method of obtaining foreign mail sent to him by hiding stamped, self-addressed, postcards inside newspapers which he then mailed to fictitious addresses abroad. When the newspaper was processed by the foreign Dead Letter Office the postcard would be discovered and sent back to Bray.
This card was franked by a British halfpenny postage stamp, which must have been visible hence the Newspaper Branch cancellation, and a Bechuananland Protectorate overprinted stamp which was required to pay the return postage.
Also shown is an extract of an article written by Bray for the 1931 edition of The Post Annual.