Portmote

And in England it hath always been held, that the king is lord of the whole shore, and particularly is the guardian of the ports and havens, which are the inlets and gates of the realm: and therefore, so early as the reign of king John, we find ships seised by the king's officers for putting in at a place that was not a legal port. These legal ports were undoubtedly at first assigned by the crown; since to each of them a court of portmote is incident, the jurisdiction of which must flow from the royal authority: the great ports of the sea are also referred to, as well known and established, by statute 4 Hen. IV. c. 20. which prohibits the landing elsewhere under pain of confiscation: and the statute 1 Eliz. c. 11. recites that the franchise of landing and discharging had been frequently granted by the crown.