Complex sentence: After his father died in the 1130s William held lordships, land and castles in Sussex, with his "caput" at Bramber, also at Totnes in Devon and Radnor and Builth in the Welsh Marches.
Split into simpler sentences: After his father died in the 1130s William held lordships, land and castles in Sussex, with his "caput" at Bramber. He also held Totnes in Devon and Radnor and Builth in the Welsh Marches.