Operation Columba
Jon Day: Pigeon Intelligence, 4 April 2019
Secret Pigeon Service
by Gordon Corera.
William Collins, 326 pp., £20, February 2018,978 0 00 822030 3 Show More
by Gordon Corera.
William Collins, 326 pp., £20, February 2018,
“... Columba was among the more successful. In Secret Pigeon Service, his book about the operation, Gordon Corera reports that attempts were also made to send messages ‘written in invisible ink on banknotes and dropped in offertory boxes in Catholic churches, which were allowed to be taken across enemy lines’, and to transmit Morse code with ... ”