It was the coldest winter for 200 years, and three friends out shooting near the Acle Straight didn’t think their blood could be any chillier: until they heard an eerie whistle.

There, approaching them on the ice, was a figure, walking purposefully towards the rivulet that was the only element of Breydon Water left unfrozen.

And as he walked, he whistled.

Weird Norfolk received a letter from reader JB Howkins, who described an unsettling meeting in the early 1960s, when he and two friends were close to the Acle Straight.