sentences:  He was elected to the House of Commons for County Down in 1845, a seat he held for the next 35 years.In 1862, on the death of their kinsman Arthur Hill-Trevor, 3rd Viscount Dungannon (on whose death the viscountcy became extinct) this branch of the Hill family succeeded to the Trevor and Dungannon estates.By arrangement parts of the estates, including Brynkinalt in Wales, passed to Lord Edwin, who assumed by Royal licence the additional surname of Trevor.