The Department will readily perceive the consequences likely to result from this event: the whole line of blockade will be infested with these cheap, convenient and formidable defenses, and we must guard every point. The measures of prevention are not so obvious. I am inclined to the belief that in addition the various devices for keeping the torpedoes from the vessels, an effectual prevention may be found in the use of similar contrivances. * * * I have attached more importance to the use of torpedoes than others have done, and believe them to constitute the most formidable of the difficulties in the way to Charleston. Their effect on the "Ironsides" in October, and now on the "Housatonic," sustains me in the idea. And thereupon he makes application to be furnished a number of torpedo boats made upon the model of the "David," a sketch of which is submitted, and also a quantity of floating torpedoes, and suggests that as he has information that the Confederates have a number of "Davids" completed and in an advanced state of construction, the Department would do well to offer a large reward of prize money for the capture or destruction of any of them, say $20,000 or $30,000 for each, adding, "they are worth more than that to us." About the same time Admiral Farragut, who had little faith in torpedoes at first, and who like other naval officers had denounced their use by the Confederates, and ordered that no quarter should be shown those captured operating them, also applied to be furnished them, saying, "Torpedoes are not so very agreeable when used on both sides, therefore, I have reluctantly brought myself to it. I have always deemed it unworthy of a chivalrous nation, but it does not do to give your enemy such a decided superiority over." And the Government of the United States, who had savagely denounced the Confederates for using them, now invited plans from inventors and mechanics for their construction, and operation, and soon supplied them abundantly to Army and Navy--adopting generally the Confederates as the best. In August, 1864, the Federal fleet advanced upon Fort Morgan at the entrance of Mobile Bay, the line being led by "Tecumseh," the newest and most powerful of the enemy's ironclads, which was completely destroyed by a torpedo planted under the direction of General Raines, Chief of the Confederate Army Torpedo Bureau. She sunk in a moment, carrying down with her her entire crew of one hundred and forty souls, save about fifteen or twenty who escaped by swimming to Fort Morgan.