Ypres Tower, Rye details

[in the Middle Ages] There were three strong gates, and on the south side, looking out across the sea, was a large stone watch-tower, known as the Ypres Tower (pronounced locally ‘Wipers’). It was built by Wlliam of Ypres, Earl of Kent, in the reign of Stephen. Te small garrison kept a close look-out for the enemy’s fleet, and when it was seen to be approaching the warden gave orders that the watch-bell, that stood close by, should be rung to alarm the inhabitants and to call them to prepare for defence. (p. 124)