This is a curious and terrible story I heard about years ago and found again in an old book on London history dating from the 1870s in my library. The story goes that when King Edward I of England expelled all the Jewish people from his kingdom, one ship captain deliberately murdered a group of Jews on the river Thames in London.

The book is called Old and New London and dates from about 1875. It details how Jewish people at that time still spoke in hushed terms about a terrible event that occurred near London Bridge in the 13th century.

After the Norman conquest of England in 1066, Jewish families were protected by the Norman kings and prospered. But things started to turn two hundred years later and then Edward I – famous as the king who executed Braveheart – decided to expel every Jew from England.

A group of Jewish Londoners hired a “mighty tall ship”, loaded all their possessions and sailed off down the Thames to an uncertain exile abroad. Accounts vary as to what happened next. One report claimed that at a place called Queenborough – near the mouth of the river Thames as it meets the sea – the captain set down the anchor.

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They were on dry sands and the captain popped over the side to take a walk. Then he suggested that the Jewish exiles might want to join him and stretch their legs. And so they did. But without noticing that as the tide rose, the captain shot off back to the ship and was hauled up quickly by a rope.

This took the Jewish group by surprise. As the water rose rapidly, they cried out to him for help. And he gave them a sarcastic response. He told them that they ought to “cry rather unto Moses by whose conduct their fathers passed through the Red Sea”.

“Raging floods” then gradually engulfed them and the captain with his crew made off with their goods. In some accounts, the captain and his fellow mariners went to see King Edward I and were rewarded for their murderous cruelty. But another account claims they were hanged for their “fraudulent and mischievous dealing”.

In the 1875 book I have, it claims that “the spot in the river Thames where many of the poor exiles were drowned by the perfidy of a master-mariner is under the influence of a ceaseless rage”. That no matter how calm the Thames was elsewhere, this stretch of water was always “furiously boisterous”.

And some tellings of the tale had this unusual river current occurring under London Bridge, for some reason. Apparently it became a point of pilgrimage with young and old Jews rowing out to the supposed location to see if the river really did rage non-stop as a constant reminder of the killing.