Complex sentence: William Fremlin was the manager of the station at some time, he would later run all of the Atkins Brother's holdings including Murgoo, Mount Narryer and Tibradden Station.
Split into simpler sentences: William Fremlin was the manager of the station at some point. He would later run all of the Atkins Brothers' holdings, including Murgoo, Mount Narryer and Tibradden Station.