which he built (using stone from the ruined ancient castle on the site[4]) on the estate purchased in 1727 by his father John Horsley.

[5] In accordance with the terms of his wife's inheritance he assumed the additional surname of Horsley in 1810.

His grandson, the fifth Baron, was a Major in the Army and also sat in the House of Lords as an Irish representative peer from 1912 to 1944.

As of 2013[update] the title is held by his grandson, the seventh Baron, who succeeded his father in 1992.

Robert Marcus Duncan de la Poer Beresford (born 1988).