Variations of the message scrawled on the wall in 1943 continue to pop up around Birmingham.
Four teenage boys were trespassing on an aristocrat's property when they found a human skull hidden in a tree.
WARNING: This article contains details readers might find distressing.
It was April 1943 and Britain was in the midst of World War II, enduring near-nightly air raids and tough food rationing.
The boys had crept onto the Hagley Estate in Worcestershire to hunt birds and raid their nests to help put food on the table.
But when Bob Farmer climbed into the creepy limbs of an elm tree, he realised that what he thought was an egg was actually a woman's head.
"There was a small patch of rotting flesh on the forehead, with lank hair attached to it. The two front teeth were crooked,"
he would later recall.
The terrified boys, fearing retribution for trespassing and uncovering a potential murder, made a pact of silence.
But the youngest boy could not keep the secret for long, confessing to his father what they found in the Hagley Woods.
Police descended on the property and found, in a hollow of a massive tree trunk, a woman's skeletal remains was hidden.
There were few clues for authorities to go on, except for some scraps of the woman's clothing and a fake gold wedding ring.
But the mystery took a strange turn when a message was scrawled on a wall in Birmingham in the middle of the night.
"Who put Bella down the wych elm?" it read.
Four teenage boys were trespassing on an aristocrat’s property when they found a human skull hidden in a tree. Eighty years on, the mystery of why she was put in a wych elm continues to haunt this English village. WARNING: This article contains details readers might find distressing.
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