A few weeks ago the man who held the key to one of the great mysteries of Western Europe died.
He was called Emile Fradin. He was a farmer in France in a village called Glozel near the town of Vichy. And he was 103 years old.
His story is extraordinary. Back in the 1920s Emile Fradin was working in a field when one of his cows stumbled into an underground chamber. It was full of strange objects - human bones with strange markings on them, human masks, hermaphrodite idols with phalluses on their head. And most mysterious of all - square clay tablets inscribed with an unknown language.
Here is a picture of a young Emile Fradin
It caused a sensation. Some leading archaeologists said they were genuine artifacts from the Neolithic period. Other - equally eminent - archaeologists insisted that they were fake. Emile Fradin stuck to his story. He sued the head of the Louvre for defamation. The head of the French Prehistoric Society persuaded the police to raid Fradin's farmhouse. He was charged with fraud, but nothing was proved.
At the heart of the mystery was the strange language. If the clay tablets were really from the Neolithic period then they predated the Phoenician characters from which western alphabets are supposed to have come.
And that would mean that the cradle of human civilisation was not the Middle East as everyone supposed, but Glozel - Emile Fradin's village.
No-one knows whether the find was one of the greatest frauds ever. Or whether Emile Fradin's stumbling cow revealed that much of what we believe about our ancient past is wrong. And now the only person who knows the truth has died.
Here is part of a film made by the BBC in 1974 about the mystery.
The characters are like something out of a Wes Anderson movie. It is full of obsessive and strange people from the world of archaeology including Emile Fradin himself. But it is dominated by the wonderful figure of Dorothy Garrod. She was the world's leading archaeologist in the 1930s and the first woman professor in Cambridge. She spent her time in the 1920s and 30s leading expeditions through Palestine and Kurdistan.
Here she is in 1913.
And to top it all there is some beautiful, obsolete 1970s technology.