While thus engaged, a sudden and violent squall came on, which, in a measure, slackened the engagement, and rendered the aim uncertain. As the squall ceased, it was discovered that the convoy had scattered in all directions, and were doing their utmost to escape. The other armed vessels now hastened to the assistance of their crippled companion. Yet the Raleigh continued to deal out her thunder, nor did she haul off until the other vessels were almost within gun-shot of her. Thus compelled, she ran to leeward, and joined the Alfred. Hoping, however, that the commodore might be induced to renew the engagement, she shortened sail, thus giving her antagonist an opportunity to restore his wounded honor; but, instead of this, he hauled in among his convoy. For several following days the American ships continued to follow the fleet, but they were not so fortunate as to receive the respects of any of the vessels of war.
The Druid, which was of twenty guns, was so much disabled as to be obliged immediately to return to England. Her loss was six killed and twenty-six wounded; among the latter, was her commander, Captain Carteret. Five of the wounded subsequently died. The Raleigh had three men killed and wounded.
3. SUB-MARINE WARFARE
During the year 1777, David Bushnell, a native of Connecticut, made several attempts to blow up the ships of the enemy by means of torpedoes. This mode of warfare had employed his thoughts during his collegiate course, so that on graduating in 1775, his plans were in a good degree matured. An account of some of his early plans he gave to the world himself. The following is a description of his celebrated torpedo: "It bore a resemblance to two upper tortoise shells of equal sizes, placed in contact, leaving, at that part which represents the head of the animal, a flue or opening sufficiently capacious to contain the operator, and air to support him thirty minutes. At the bottom, opposite to the entrance, was placed a quantity of lead for ballast. The operator sat upright, and held an oar for rowing forward or backward, and was furnished with a rudder for steering. An aperture at the bottom with its valves admitted water for the purpose of descending, and two brass forcing-pumps served to eject the water within, when necessary for ascending. The vessel was made completely water-tight, furnished with glass windows for the admission of light, with ventilators and air-pipes, and was so ballasted with lead fixed on the bottom as to render it solid, and obviate all danger of oversetting. Behind the sub-marine vessel was a place above the rudder for carrying a large powder magazine; this was made of two pieces of oak timber, large enough, when hollowed out, to contain one hundred and fifty pounds of powder, with the apparatus used for firing it, and was secured in its place by a screw turned by the operator. It was lighter than water, so that he might rise against the object to which it was intended to be fastened.
"Within the magazine was an apparatus constructed to run any proposed period under twelve hours; when it had run out its time, it unpinioned a strong lock, resembling a gun-lock, which gave fire to the powder. This apparatus was so pinioned, that it could not possibly move, until, by casting off the magazine from the vessel, it was set in motion. The skillful operator could swim so low on the surface of the water, as to approach very near the ship in the night, without fear of being discovered, and might, if he chose, approach the stem or stern above water, with very little danger. He could sink very quickly, keep at any necessary depth, and row a great distance in any direction he desired, without coming to the surface. When he rose to the top, he could soon obtain a fresh supply of air, and, if necessary, descend again and pursue his course."
With a torpedo of the above construction, Bushnell made an experiment on the Eagle, a sixty-gun ship, then lying in the harbor of New York, and under command of Lord Howe. A sergeant of one of the Connecticut regiments conducted the operation. General Putnam, standing on the wharf, was a witness of the proceeding.
The sergeant, having under cover of night proceeded to the ship, attempted to fasten the torpedo to her bottom by means of a screw. But in this he failed, striking, as he supposed, a bar or bolt of iron, which resisted the screw. In attempting to move to another place, he passed from under the ship, and soon rose to the surface. By this time, daylight had so far advanced as to make any further experiments hazardous. He therefore concluded to return to New York. On passing Governor's island, supposing himself discovered by the British stationed there, he cast off his magazine, and proceeded without it. The internal apparatus was set to run one hour; at the expiration of which, it blew up, in a tremendous explosion, throwing a vast column of water to a great height, to the no small wonder of the enemy.
This experiment was followed in the course of the year by an attempt from a whaling-boat against the frigate Cerebus, off New London. The expedient adopted in this case was to draw a machine, loaded with powder, against her side by means of a line, to be exploded by a gun-lock. But failing to attach itself as intended, against the frigate, it became attached to a schooner, at anchor astern of the frigate, which, on exploding, it demolished.
In a letter addressed to Sir Peter Parker, by Commodore Simmons, at the time of the explosion on board the Cerebus, he gave an account of this singular disaster. Being at anchor to the westward of the town with a schooner which he had taken, about eleven o'clock in the evening he discovered a line towing astern from the bows. He believed some person had been veered away by it, and immediately began to haul in. A sailor belonging to the schooner taking it for a fishing-line, laid hold of it, and drew it in about fifteen fathoms. It was buoyed up by small pieces tied to it at regular distances. At the end of the rope a machine was fastened, too heavy for one man to pull up, for it exceeded one hundred pounds in weight. The other people of the schooner coming to his assistance, they drew it upon deck. While the men, to gratify their curiosity, were examining the machine, it exploded, blew the vessel into pieces, and set her on fire. Three men were killed, and a fourth blown into the water, very much injured. On subsequent examination, the other part of the line was discovered buoyed up in the same manner; this the commodore ordered to be instantly cut away, for fear (as he termed it) of hauling up another of the "infernals!"