Otto Koehn was a Dorchester prisoner of war nicknamed ‘ Jack in a Box’ for his extraordinary exploit. He was a distinguished-looking young man with fair hair and a slight fair moustache. Just 22 years old, he wore a pince-nez. Travelling on a Dutch vessel from the USA to Germany, Otto had been arrested when it berthed at Falmouth. At the start of World War I, he was interned in the prisoner of war camp at Poundbury just outside Dorchester. This was a large camp with as many as 4,500 German and Austrian prisoners. No sooner had Otto arrived in Poundbury, he started to scheme his escape. The opportunity arose when he heard that a group of elderly interns were being sent back to Germany, for humanitarian reasons, as a part of a prisoner exchange agreement with the British. They would travel to Tilbury by train and join the steamer, SS Batavia. After arriving in Rotterdam, they could easily return to the Fatherland. In the prisoners’ canteen Otto bought a box which had contained matches