Slight geographical error for the location of Rogerstone Castle - its actually at 5135'03.7"N 303'12.81"W, just visible on the ground if you peek over the wall opposite the car lot!

The castle is interesting because the name of the local area - Rogerstone derives from its builder - Roger de Berkerolle. However, as you might expect, the natives weren't too fond of Roger, and they named the area after his rather more ameniable son William, hence Rogerstone in English, and Tre-Gwillym in Welsh!