On the hill, about one hundred feet above the town, is the castle, which has seen a good many stirring events in its time; but its only garrison now consists of a single individual, who, I suppose, is placed there to prevent the rats from taking possession.  It was built in the time of Queen Elizabeth, by Sir Francis Godolphin; but its chief interest arises from its being the last spot on British soil which held out for the Royalists in the days of Cromwell, when Sir John Grenville was governor. Prince Charles fled here, and remained until he took his departure for Jersey.  For six years the stout Sir John retained his post, and having collected a number of vessels, fitted them out as cruisers, for the purpose of crippling the forces of the Parliamentary party.  These cruisers had, in truth, very much the character of pirates, and were not particular what vessels they robbed.  Having plundered some Dutchmen, they were very nearly being severely punished by old Van Tromp, who appeared with a squadron.  When summoned to surrender, Sir John refused, and Van Tromp sailed away.  At length, so urgent became the representations of the merchants whose vessels had been captured, that Parliament sent an expedition, under Admiral Blake and Sir George Askew, when Sir John was compelled to surrender; and he, with the eight hundred men forming his garrison, received honourable terms.