After 26 years of digging, I finally unearthed treasure on the plot!
It looked like a coin all encrusted in grunge. Perhaps it would be a Roman coin?
After a few scrapes and scrubs the treasure turned out to be a humble halfpenny with George VI on one side and a sailing ship on the other. But the date was auspicious – 1942 the year I was born – so I’m keeping the humble halfpenny as a good luck token!