Mediæval Military Architecture in England, Volume 2 (of 2)

Although the Western or Shakespeare’s Cliff is part of a larger range, the Castle Hill is better suited for defence. It is, in fact, an isolated knoll about 1,000 yards north and south, and 500 yards east and west, the summit being a steep and narrow ridge. Towards the south its boundary is the sea cliff, 320 feet high, and to the west the deep valley of the town. To the east and north are other valleys, less deep but by no means inconsiderable, and the sides of which are steep. Moreover, the whole hill is of chalk, that is to say, of a material easily scarped and capable of retaining any general outline to which it may be cut.