Complex sentence: In 1787 Brown crossed the Atlantic to serve as a minister in St Matthews Church in Halifax, Nova Scotia and also served as chaplin to the North British Society and British naval and army forces in the area.
Split into simpler sentences: In 1787 Brown crossed the Atlantic to serve as a minister in St Matthews Church in Halifax, Nova Scotia. He held the office of chaplain to the North British Society, and to the British naval and army forces in the area.