Complex sentence: Burial rates at St John's declined rapidly around the turn of the 20th century, the Rector's notes from the time indicate that many funeral services conducted at the church now preceded burial at Rookwood cemetery.
Split into simpler sentences: Burial rates at St John's declined rapidly around the turn of the 20th century. The Rector's notes from the time indicate that many funeral services conducted at the church now preceded burial at Rookwood Cemetery.