In 1620, Scottish settler Sir Frederick Hamilton received extensive grants of land in County Leitrim – territory seized from the O’Rourke clan during the Plantation of Leitrim. Over the next two decades, Hamilton steadily expanded his holdings, accumulating close to 18,000 acres of confiscated land.

By 1634, he had completed Manorhamilton Castle, a fortified residence built deep within hostile territory. The stronghold came under repeated attack during the conflicts of the 1640s, and Hamilton’s reputation for severity soon spread throughout the region.

In July 1642, following cattle raids attributed to members of the O’Rourke clan in Sligo, Hamilton retaliated with devastating force. He ordered the burning of the town of Sligo, and the flames consumed numerous buildings, including the Dominican friary – an act still remembered for its brutality.

Folklore, however, suggests a twist of fate. As Hamilton’s soldiers travelled back through the mountains, a thick fog descended. Disoriented, they accepted help from a lone rider on a white horse who appeared out of the mist. Some followed him… only to be led over the edge of a cliff. Whether the figure was a vengeful spirit, a trickster, or simply a tale woven from fear and exhaustion, no one can say for certain.

The following year, Hamilton ordered the execution of dozens of local prisoners, who were hanged on a scaffold within the castle grounds.

But despite his power, the tide was turning. Years of financing private armies, defending his estate, and launching punitive raids had drained both his resources and his support. Suffering from ill-health and facing criticism even from fellow settlers, Hamilton withdrew to Edinburgh. He died there in 1647, aged just 57, reportedly in “reduced circumstances.”

Five years later, during renewed conflict, Manorhamilton Castle was stormed and set ablaze. Never rebuilt, its ruined shell still stands — and many say the site is far from silent.

Visitors frequently describe a heavy, oppressive atmosphere, sudden cold spots, and the faint sound of weeping drifting through the empty chambers. Others claim to have seen the castle’s most enduring apparition: a lady in white, gliding across the courtyard. She is said to linger near the old gallows site, watching and waiting, as though trapped in a tragedy long forgotten.

Her identity remains unknown. Some believe she was connected to one of the men who died on Hamilton’s orders; others whisper that she may have been one of Hamilton’s own victims – another life lost in the turmoil that shaped the castle’s short, violent history.