Morgan was working in the kitchens in the early hours of a Sunday in September 1804 when she became unwell. She later went to her room in the servant's quarters of the castle. Early that evening the cook went to her room and accused Morgan of having given birth to a baby, which at first she strongly denied. Later, according to the evidence given by the cook, Morgan "owned that she had delivered herself of a child which was in the underbed cut open, amongst the feathers with the head nearly divided from the body, and the severely damaged intestinal system removed and placed underneath the child."
Inquest and trial
The inquest on the baby was held at Glasbury two days later, and the Coroner's Jury found that: Morgan was too ill to travel to Presteigne, where the Assizes were held, until 6 October. The trial eventually began in April 1805 before Mr Justice Hardinge, concluding on 11 April, when the jury found her guilty of murdering her child.
Death
On 13 April Morgan was hanged, and was buried in what was then unconsecrated ground near the church later that same afternoon. Her public execution attracted large crowds, who watched as she was taken by cart from the gaol to the execution at Gallows Lane. She was subsequently commemorated by two gravestones in the churchyard at Presteigne.
Myths and controversies
For some time after the execution, it was claimed the father of the murdered child was Walter Wilkins the Younger, the son of the Member of Parliament and High Sheriff for the county and the "young squire" of Maesllwch Castle. Wilkins was a member of the grand jury which found Morgan had a case to answer. Although this theory is broadly discredited today, it has been key in cementing the popular characterisation of Mary Morgan as the helpless victim of an unscrupulous aristocrat. The father is now generally agreed to have been one of her fellow servants at the castle.
Revisionism
Since her execution, there has been a concerted effort to redeem Morgan's reputation. Her case became a causes célèbre for feminists who have presented her trial as a miscarriage of justice and suggested the Judge and jury were misogynistic, although it has never been disputed that the murder happened and there is no reason to believe the verdict or punishment could have been different.