By the 24th of August, Preble's patience was exhausted; and, without waiting longer for the expected squadron, he began an attack upon the town. On the night of the 24th, a few shells were thrown into Tripoli, but did little damage. Four days later, a more determined attack was made, in which every vessel in the squadron took part. Two of the enemy's gunboats were sunk; but with this exception little material damage was done, though the Americans chose the most advantageous positions, and fired fast and well. It was becoming evident that men-of-war were no match for stone walls.
During this engagement, the American fleet came within range of the Bashaw's palace, and the flying shot and shell drove that dignitary and his suite to a bomb-proof dungeon. One heavy shot flew in at the window of the cell in which Capt. Bainbridge was confined, and striking the wall, brought down stones and mortar upon him as he lay in bed, so that he was seriously bruised. But the American captain was in no way daunted, and the next day wrote in sympathetic ink to Preble, telling him to keep up his fire, for the Tripolitans were greatly harassed by it.
On Sept. 3, yet another attack upon the town and fortress was made. As in the foregoing instances, nothing was accomplished except the throwing of a vast quantity of shot and shell. Capt. Bainbridge, in a secret letter to Preble, reported, that of the shells he had seen falling in the city very few exploded, and the damage done by them was therefore very light. Preble investigated the matter, and found that the fuse-holes of many of the shells had been stopped with lead, so that no fire could enter. The shells had been bought in Sicily, where they had been made to resist a threatened invasion by the French. It is supposed that they had been thus ruined by French secret agents.
But, before this time, Commodore Preble, and the officers under his command, had about reached the conclusion that Tripoli could not be reduced by bombardment. Accordingly they cast about for some new method of attack. The plan that was finally adopted proved unfortunate in this instance, just as similar schemes for the reduction of fortresses have prove futile throughout all history. Briefly stated, the plan was to send a fire-ship, or rather a floating mine, into the harbor, to explode before the walls of the fortress, and in the midst of the enemy's cruisers.
The ketch "Intrepid," which had carried Decatur and his daring followers out of the harbor of Tripoli, leaving the "Philadelphia" burning behind them, was still with the fleet. This vessel was chosen, and with all possible speed was converted into an "infernal," or floating mine. "A small room, or magazine, had been planked up in the hold of the ketch, just forward of her principal mast," writes Fenimore Cooper. "Communicating with this magazine was a trunk, or tube, that led aft to another room filled with combustibles. In the planked room, or magazine, were placed one hundred barrels of gunpowder in bulk; and on the deck, immediately above the powder, were laid fifty thirteen-and-a-half-inch shells, and one hundred nine-inch shells, with a large quantity of shot, pieces of kentledge, and fragments of iron of different sorts. A train was laid in the trunk, or tube, and fuses were attached in the proper manner. In addition to this arrangement, the other small room mentioned was filled with splinters and light wood, which, besides firing the train, were to keep the enemy from boarding, as the flames would be apt to induce them to apprehend an immediate explosion."
Such was the engine of death prepared. The plan of operations was simply to put a picked crew on this floating volcano, choose a dark night, take the "infernal" into the heart of the enemy's squadron, fire it, and let the crew escape in boats as best they might.
The leadership of this desperate enterprise was intrusted to Lieut. Richard Somers. Indeed, it is probable that the idea itself originated with him, for a commanding officer would be little likely to assign a subordinate a duty so hazardous. Moreover, there existed between Decatur and Somers a generous rivalry. Each strove to surpass the other; and since Decatur's exploit with the "Philadelphia," Somers had been seeking an opportunity to win equal distinction. It is generally believed, that, having conceived the idea of the "infernal," he suggested it to Preble, and claimed for himself the right of leadership.
But ten men and one officer were to accompany Mr. Somers on his perilous trip. Yet volunteers were numerous, and only by the most inflexible decision could the importunate ones be kept back. The officer chosen was Lieut. Wadsworth of the "Constitution," and the men were chosen from that ship and from the "Nautilus."
As the time for carrying out the desperate enterprise drew near, Preble pointed out to the young commander the great danger of the affair, and the responsibility that rested upon him. Particularly was he enjoined not to permit the powder in the ketch to fall into the hands of the Tripolitans, who at that time were short of ammunition. One day, while talking with Somers, Preble burned a port-fire, or slow-match, and, noting its time, asked Somers if he thought the boats could get out of reach of the shells in the few minutes it was burning.
"I think we can, sir," was the quiet response.