Complex sentence: James Surtees Phillpotts was appointed as the twenty-second Headmaster of Bedford School in 1874, at the age of thirty-five, and remained in that position until his retirement in 1903.
Split into simpler sentences: James Surtees Phillpotts was appointed as the twenty-second Headmaster of Bedford School in 1874 at the age of thirty-five. He remained in that position until his retirement in 1903.