[1] He was involved in the Mulholland family cotton and linen industry and also represented Downpatrick in the British House of Commons from 1874 to 1885.
according to the Introduction to the Dunleith Papers[2] held at the Public Record Office of Northern Ireland (PRONI).
The 77ft schooner Egeria was built for him in 1865 by Wanhill's Yard of Hamworthy, raced successfully for many years, and was retained and sailed by his son, Henry.
[4] In 1851, Lord Dunleath was married to Frances Louisa Lyle (d. 1909), daughter of Hugh Lyle and Harriet Cromie (a daughter of John Cromie) of Knocktarna in County Londonderry.
[1] Together, they were the parents of:[5] He died in December 1895, aged 75, and was succeeded in the barony by his second son Henry.