Henry III. spent large sums here, and the Water Tower and adjacent Warder’s Tower and the stair of Lunn’s Tower are probably his work, together with large repairs to the south and east curtain. It is also pretty certain that to him must be attributed the great dam, and therefore the older parts of Mortimer’s and the Gallery Towers. Of parallel cases, the lake at Caerphilly belongs to the end of that reign; as, or to the commencement of that of Edward I., does the completion of that at Ledes in Kent. The Brayz, being a necessary adjunct to the dam, must have been contemplated while that was made, and therefore is probably of the same date. The light earthworks crossing the Warwick road are probably the work of Simon de Montfort the younger, thrown up in haste to check the approach of the royal troops from Warwick. Save the Gallery Tower, bridge, and the outer gatehouse, there does not appear to have been any masonry beyond the lake. The castle contains but little pure Decorated work. The kitchens, hall, and rooms to the south-east, called Lancaster’s buildings, are probably the work of John of Gaunt, late in the fourteenth century. They no doubt replaced other less magnificent domestic buildings of Norman date. The chapel seems rather earlier than the hall, the barn later, and its upper floor later still. The later Plantagenet and earlier Tudor sovereigns did little more than keep up the place; and thus it remained, until it was granted by Elizabeth to Robert Dudley, Earl of Leicester, who spent a large sum of money upon it in buildings and gardens, most of which have disappeared. He gutted the keep and forebuilding, and fitted them up in the Tudor style; and raised the lofty, but flimsy, pile known as Leicester’s buildings. He also embellished the entrance by the Brayz and Gallery Tower, and built the gatehouse still standing to the north-east, a very fine example of a declining period in English architecture. He probably filled up the east ditch and the inner north ditch, if such there was. The castle does not seem to have been inhabited after Leicester’s death. Prince Henry and his brother used it more for its chase than as a residence, and their successors, until recently, allowed it to be used as a quarry. During the Parliamentary wars, the north side of the keep was taken down, and the gorge of Lunn’s Tower blown up. Probably the lake was drained afterwards, when land became valuable.