Complex sentence: He was also called upon to assist in preparing a bill for the general valuation of Ireland; the act was passed in 1826, and he was appointed commissioner of valuation, in which capacity he continued to act until 1868.
Split into simpler sentences: He was also called upon to assist in preparing a bill for the general valuation of Ireland. The act was passed in 1826, and he was appointed Commissioner of Valuation, in which capacity he continued to work until 1868.