It was after dusk when the devoted adventurers boarded the powder-laden ketch, as she lay tossing at her anchorage. Shortly after they had taken possession, a boat came alongside with Decatur and Lieut. Stewart in the stern-sheets. The officers greeted their comrades with some emotion. They were all about of an age, followed one loved profession, and each had given proofs of his daring. When the time came for them to part, the leave-taking was serious, but tranquil. Somers took from his finger a ring, and breaking it into four pieces, gave one to each of his friends. Then with hearty handshakings, and good wishes for success, Decatur and Stewart left their friends. On the ketch was one man who had not been accepted as a volunteer. This was Lieut. Israel of the "Constitution," who had smuggled himself aboard. With this addition to his original force, Somers ordered sail made, and the "Intrepid" turned her prow in the direction of the Tripolitan batteries. As far as the harbor's mouth, she was accompanied by the "Argus," the "Vixen," and the "Nautilus." There they left her, and she pursued her way alone. It was a calm, foggy night. A few stars could be seen glimmering through the haze, and a light breeze ruffled the water, and wafted the sloop gently along her course. From the three vessels that waited outside the harbor's mouth, eager watchers with night-glasses kept their gaze riveted upon the spectral form of the ketch, as she slowly receded from their sight. Fainter and fainter grew the outline of her sails, until at last they were lost to sight altogether. Then fitful flashes from the enemy's batteries, and the harsh thunder of the cannon, told that she had been sighted by the foe. The anxious watchers paced their decks with bated breath. Though no enemy was near to hear them, they spoke in whispers. The shadow of a great awe, the weight of some great calamity, seemed crushing them. "What was that?" All started at the abrupt exclamation. Through the haze a glimmering light had been seen to move rapidly along the surface of the water, as though a lantern were being carried along a deck. Suddenly it disappeared, as though dropped down a hatchway. A few seconds passed,--seconds that seemed like hours. Then there shot up into the sky a dazzling jet of fire. A roar like that of a huge volcano shook earth and sea. The vessels trembled at their moorings. The concussion of the air threw men upon the decks. Then the mast of the ketch, with its sail blazing, was seen to rise straight into the air, and fall back. Bombs with burning fuses flew in every direction. The distant sound of heavy bodies falling into the water and on the rocks was heard. Then all was still. Even the Tripolitan batteries were silent.