There are good reasons for the belief that the English claims to the sovereignty of the sea originated in this humble way--by the exercise of jurisdiction in the interests of peaceful commerce--some time after the Norman Conquest, and in all probability first of all in the Channel or the Straits of Dover. The earliest indication of it is to be found in the much-discussed ordinance which King John issued in 1201. By that ordinance any ships or vessels, “laden or empty,” which refused “at sea” to lower their sails when ordered to do so by the king’s lieutenant or admiral in any voyage appointed by the Council, and resisted the demand, were to be reputed as enemies, and the ships, vessels, and goods were to be seized and forfeited and the crews punished. This is the first evidence of the custom of lowering the top-sails and striking the flag which afterwards became so notorious as a supposed acknowledgment of the English sovereignty of the sea; and it is to be noted that, in later times at least, the vessel had not only to strike, but had also to “lie by the lee.” Considering the prevalence of piracy and the jurisdiction exercised by the state for its suppression, as above described, and in view likewise of the special measures taken by John to encourage and safeguard foreign commerce, the most reasonable explanation of the origin of the custom is that the demand for the sail to be lowered--and the largest vessels then had but one mast and a single sail--was to enable the king’s officers, who were there to maintain the security of navigation, to ascertain the true nature of the vessel which they challenged, whether it was a peaceful trader or a pirate. In all ages piratical vessels have been generally swift, and, if we judge from later times, the ships used in the navy were generally slow: the command to a vessel to lower its sails was thus made in order to deprive it of the power of escaping until the king’s officers had satisfied themselves as to its _bona fides_, and was equivalent to the gun that was fired in later times in connection with “visit and search.” Shortly before the ordinance was issued, John sent writs to the Mayor and Commonalty of London and to all the Sheriffs of England instructing that all merchants, of what nation soever, should have safe conduct to pass into and repass from England, and to enjoy peace and security.[4] It is noteworthy that in the first record relating to the seizure of a vessel for not lowering its sail (a Flemish herring smack, in 1402) it was pled on its behalf that it was not armed, and that the sail had been dropped at the first command. It is also noteworthy that the ordinance of John was placed in the _Black Book of the Admiralty_ immediately after the mercantile marine laws.