Complex sentence: At the time of the Domesday Book it formed part of the estates of Durand, the Sheriff of Gloucester, and he and his successors began the process of woodland clearance and established the village of "Sheriff's Newton", now Shirenewton.
Split into simpler sentences: At the time of the Domesday Book it formed part of the estates of Durand, the Sheriff of Gloucester. He and his successors began the process of woodland clearance, and established the village of "Sheriff's Newton", now Shirenewton.