The larger number of the officers and men of the navy were sound Protestants, who regarded the proceedings of James with jealous eyes; and thus, notwithstanding his magnificent fleet, Lord Dartmouth could only muster 17 sail of the line, chiefly third and fourth-rates, 3 frigates, 13 fire-ships, and 3 yachts to oppose the landing of the Prince of Orange. On the 12th of December, 1688, James the Second finished his short reign by abdicating the throne, at which time the navy consisted of 173 sail, showing that he must have either built or purchased sixty ships. CHAPTER TEN. A VIEW OF NAVAL AFFAIRS IN CHARLES THE SECOND'S REIGN. A.D. 1660 to A.D. 1689. When great guns or cannon came into use, the old style of fighting at sea was completely changed. We hear of them as early as the thirteenth century, employed in a naval engagement between the King of Tunis and the Moorish King of Seville. They were first used on shore by the English at the battle of Crescy, fought in 1346, and at sea by the Venetians about the year 1380. In the reigns of Richard the Third and Henry the Seventh they were first employed by the English at sea. They were not then, however, as now, pointed through port-holes, but were mounted so as to fire over the bulwarks of the vessel. In those days, therefore, ships of war could have had but one armed deck, and were probably urged by oars as well as by sails. Port-holes were invented by Descharves, a French builder at Brest, and the first English ship in which they were formed was the _Henry Grace de Dieu_, built at Erith in 1515. She was said to have been of no less than 1000 tons burden, but as we are ignorant of the mode in which ships were measured for tonnage in those days, we cannot tell her actual burden. She must, however, have been a large vessel, for she had two whole decks, besides what we now call a forecastle and poop. She mounted altogether eighty pieces, composed of every calibre in use; but of these not more than fifty-four, according to the print before us, were pointed through broadside ports. The rest were either mounted as bow or stern chasers, or as "murdering pieces," as they were called, which pointed down on the deck; their object apparently being, should a ship be boarded, to fire on the enemy. The calibre of great guns was not in those days designated by the weight of the shot they discharged. This was probably from the reason that the balls were not all made of the same materials. At first they were of stone; then those of iron were introduced; and sometimes they were formed of lead; and, at an early period, hollow iron shot, filled with combustible matter, were brought into use. Thus the weight of shot fluctuated too much to serve for the classification of the gun from which it was fired. Ships' guns in those days were known as cannon, cannon royal, cannon serpentine, bastard cannon, demi-cannon, and cannon petro.