On the night of 15th May 1855, three boxes of gold, valued at over one million pounds in today’s money, were placed aboard the guard’s van at London Bridge Station. However, when the boxes arrived in Paris, railway officials discovered that lead shot had replaced the gold. Who had carried out this audacious robbery? Investigator Mr Rees was put on the case.

The trail led to Pentonville prison where Edward Agar, a professional criminal, was awaiting transportation to Australia for passing false cheques. In fact, he’d been set up by a fellow thief because of his affair with the thief’s mistress. Bitter about the set up, Agar confessed to the robbery, implicating his former mates and revealing that there was no honour amongst this gang of thieves.

Until Agar’s confession, the authorities had been clueless, the French blaming the English and the English blaming the French in comical fashion. However…