Complex sentence: In 1742 he became physician to the Earl of Stair, then commanding the British army in Flanders, and in 1744 was appointed by the Duke of Cumberland physician-general to the forces in the Low Countries.
Split into simpler sentences: In 1742 he became physician to the Earl of Stair, then commanding the British army in Flanders. In 1744 he was appointed by the Duke of Cumberland physician-general to the forces in the Low Countries.