Complex sentence: He served as Solicitor-General for Ireland, 1836 and as Attorney-General for Ireland in 1838; he was the first Roman Catholic to be appointed Chief Baron of the Irish Exchequer, but died young from poor health and overwork.
Split into simpler sentences: He served as Solicitor-General for Ireland, 1836 and as Attorney-General for Ireland in 1838;. He was the first Roman Catholic to be appointed Chief Baron of the Irish Exchequer, but died young from poor health and overwork.