The Confederate naval officers were not parties to the capitulation, which was drawn up and signed on board Porter's flag-ship, the Harriet Lane. While the representatives were seated in her cabin, flags of truce flying from her masthead and from the forts, the Louisiana was fired by her commander and came drifting down the river in flames. Her guns discharged themselves as the heat reached their charges, and when she came abreast Fort St. Philip she blew up, killing a Confederate soldier and nearly killing Captain McIntosh, her former commander, who was lying there mortally wounded. This act caused great indignation at the time among the United States officers present. Commander Mitchell afterward gave explanations which were accepted as satisfactory by Mr. Welles, the Secretary of the Navy. He said that the Louisiana was secured to the opposite shore from the fleet, three-quarters of a mile above, and that an attempt had been made to drown the magazine. As proof of good faith he had sent a lieutenant to notify Porter of the probable failure of that attempt. It remains, however, a curious want of foresight in a naval man not to anticipate that the hempen fasts, which alone secured her, would be destroyed, and that the vessel thus cast loose would drift down with the stream. Conceding fully the mutual independence of army and navy, it is yet objectionable that while one is treating under flag of truce, the other should be sending down burning vessels, whether carelessly or maliciously, upon an unsuspecting enemy. When taken possession of, Fort Jackson was found to have suffered greatly. The ground inside and out was plowed by the falling shell; the levee had been cut in many places, letting water into the fort; the casemates were shattered, guns dismounted and gun-carriages destroyed; all the buildings within the walls had been burned. Yet it was far from being reduced to an indefensible condition by six days' bombardment, could it have continued to receive supplies and reinforcements. The loss of the garrison had been 14 killed and 39 wounded. The question of the efficacy of mortar-firing was raised in this as in other instances. Granting its inability to compel the surrender, it remains certain that Fort Jackson, though the stronger work, inflicted much less damage upon the passing fleet than did St. Philip. The direct testimony of Commander De Camp of the Iroquois, and an examination of the injuries received by the ships, when clearly specified, shows this. As both posts had been under one commander, it may be inferred that the difference in execution was due partly to the exhaustion of the garrison, and partly to the constant fire of the mortar flotilla during the time of the passage; both effects of the bombardment.