Cell No. 20 showing the spy-plug in position. Diagram showing the method by which the spy plug automatically was hidden behind the radiator whenever the door was opened, 1918 (c).
Watercolour relating to the escape made by Maj Michael Charles Cooper Harrison, Royal Irish Regiment.
One of eight watercolours from the originals by Capt H A Cartwright, 1918 (c) and George Leech, 1950 (c).
Associated with the Royal Irish Regiment and Middlesex Regiment, World War One, POWs (1914-1918).

Cell No. 20 showing the spy-plug in position. Diagram showing the method by which the spy plug automatically was hidden behind the radiator whenever the door was opened, 1918 (c)