Complex sentence: After such a distinguished career at the school, Horan was referred to as the "Mr Chips" of Fort Street and upon retirement, he wrote widely regarding the school with "Fort Street, the School" followed by "Maroon and Silver".
Split into simpler sentences: After such a distinguished career at the school, Horan was referred to as the "Mr Chips" of Fort Street. After he had retired he wrote books about the school with "Fort Street, the School" being followed by "Maroon and Silver".