Some 1,650 years ago someone was so comprehensively fed up with the state of the Roman empire that they committed an act of treason, blasphemy and probably criminal defacing of the coinage. They cursed the emperor Valens by hammering a coin with his image into lead, then folding the lead over his face.

The battered scraps of metal discovered by Tom Redmayne, an amateur metal detector, in a muddy field in Lincolnshire are a unique find.

The mid-fourth century was a time of turmoil in Roman Britain. A Roman aristocrat, Valentinus, had been exiled to Britain where he was stirring up trouble.

Thousands of Roman cursing charms survive, scrawled on pieces of lead with a hole punched to hang them up. Many were found thrown into the hot springs in Bath, demanding revenge on those guilty of petty theft.

Nothing as audacious as cursing an emperor has ever been found before. However, Sam Moorhead, a coins expert at the British Museum and expert adviser to the Portable Antiquities Scheme, which encourages voluntary reporting of finds, is convinced it is the only explanation.

Redmayne’s find is unprecedented, but is just one of a torrent of 300,000 valuable, fascinating or downright weird object finds reported by amateurs in the 10 years. Read Full Story