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
Cinque Ports to levy tolls, punish those who shed blood or flee justice, punish minor offences, detain and execute criminals both inside and outside the port's jurisdiction, and punish breaches of the peace; and possession of lost goods that remain unclaimed after a year, goods thrown overboard, and floating wreckage. The leeway given to the Cinque Ports, and the turning of a blind eye to misbehaviour, led to smuggling, though common everywhere at this time becoming more or less one of the dominant industries. A significant factor in the need to maintain the authority of the Cinque Ports by the King was