One thus finds in English history a great deal which refers to the sovereignty of the sea, although the words were not always used to signify the same thing. Most commonly perhaps they meant a mastery or supremacy by force of arms,--what is now so much spoken of as sea-power. In times of peace, the strength of the navy should be such as to safeguard the commerce that came to the realm and went from it, thus enabling merchants and traders to carry on their traffic in security. In time of war, the fleets should be strong enough to sweep the seas, so that, as it has been described, the bounds of the empire should then be the coasts of the enemy. But, more strictly, the sovereignty of the sea was a political sovereignty that existed as a matter of right, and was duly recognised as such, apart from an actual predominance of naval power at the time, just as the sovereignty of a state exists on land, though in both cases its maintenance may depend upon the sword. In this sense, the sovereignty of the sea signified the same sole power of jurisdiction and rule as obtained on land, and also, in its extreme form, an exclusive property in the sea as part of the territory of the realm,--very much indeed like the rights that are now admitted by the law of nations to appertain to the so-called territorial waters of a state. Many things and many interests were thus embraced in the term besides the question of naval ascendency. There were jurisdictions of various kinds and for various purposes. There was the important subject of the fisheries in the waters adjacent to the coasts, or, it might be, in distant regions. There was the still more important question of the freedom or restriction of commerce and navigation from one European country to another, or to the remote countries in the east or west which had been opened up to commercial enterprise by the discoveries of the early navigators. There was, moreover, another subject which was specially characteristic of the English pretensions to the dominion of the seas, and which gave rise to more trouble than all the others combined, and that was the demand that foreign vessels on meeting with a ship of the king’s should lower their top-sails and strike their flag as a token and acknowledgment of that dominion.