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
Lord Warden of the Cinque Ports of the Cinque Ports", they reflected an early concept that military service at sea constituted land tenure "per baroniam" making them "quasi" feudal barons. The early 14th-century treatise "Modus Tenendi Parliamentum" stated the Barons of the Cinque Ports to hold a place of precedence below the lay magnates but above the representatives of the shires and boroughs. Writs of summons to parliament were sent to the warden following which representative barons of the Cinque Ports were selected to attend parliament. Thus the warden's duty in this respect was similar to that of the sheriff who received the writs for distribution