Unfortunately for the d’Arcy family, John d’Arcy’s son and heir, Hyacinth, did not possess his father’s vision and drive, and frequently clashed with tenants. When Hyacinth led the family into bankruptcy during the Great Famine of the mid-19th century, the castle and the town were sold to the Eyre family from Bath in England, whose crest is depicted above the entrance.
Lands of the castle were taken over by the state and redistributed among the tenants in the early 20th century. Without an on-site guardian, the castle soon fell into disrepair, and many of its fixtures, fittings and useful building materials were stripped, quarried and recycled away for use elsewhere. Today the castle is a roofless ruin, and an evocative reminder of the wealth and ambition of John d’Arcy.