Complex sentence: He served as president from 1897 until his death in 1914, when his nephew, Charles Edward Cotting carried on the family's dedication serving as the school's treasurer until 1981.
Split into simpler sentences: He served as president of the school from 1897 until his death in 1914. His nephew, Charles Edward Cotting, carried on the family's dedication by serving as the school's treasurer until 1981.