John Boys (Royalist) Boys himself went to London rather than continue further military resistance while others of the Regiment went on to serve at Wallingford Castle. During August 1648, he made a futile attempt to raise the Siege of Walmer Castle in Deal, one of the Cinque Ports, and customary home of the Lord Warden. Sir Algernon Sydney replaced him as Warden in 1648. In 1659, Boys was held as a prisoner in Dover Castle for "petitioning for a free Parliament", but was released on 23 February 1660. He was then, reputedly, granted the office of Receiver of Customs at Dover from Charles
Walmer Castle and were connected by earthwork defences. The original invasion threat passed, but during the Second English Civil War of 1648–49, Walmer was seized by pro-Royalist insurgents and was only retaken by Parliamentary forces after several months' fighting. In the 18th century, Walmer became the official residence of the Lord Warden of the Cinque Ports and was gradually modified from a military fortification into a private residence. Various Prime Ministers and prominent politicians were appointed as Lord Warden, including William Pitt, the Duke of Wellington and Lord Granville, who adapted parts of the Tudor castle as living spaces and constructed extensive