A skull was discovered in David Attenborough's garden back in October when workmen were building an extension at his home, reports AFP.
Since then, the skull has been identified as belonging to Julia Martha Thomas, who was 55 years old at the time of her death, using census records and radiocarbon testing.
West London coroner Alison Thompson concluded that the cause of death was asphyxiation and head injury.
Thomas was murdered by her maid Kate Webster, 29, who reportedly cut Thomas's head off with an axe before boiling the rest of her remains and giving it to children for them to eat.
Webster was convicted and executed, even though Thomas's head was never found until recently.
The case was known as the 'Barnes Mystery' at the time.
A local police commander said: "This is a fascinating case and a good example of how good old-fashioned detective work, historical records and technological advances came together to solve the Barnes Mystery."
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