At Huntsville, Alabama, a caisson of Croswell's Illinois battery exploded, killing instantly privates Jacob Englehart, John Olsin, Wm. Humphrey, David Roach, Wm. Mattison, and Horace Allen, and wounding George Barnes, and Wm. Regan. Several of the bodies of the killed were blown to atoms, and portions were found five hundred feet distant. The horses attached to the caisson were killed. The railroad depot was badly shattered. One citizen had his thigh broken, and several others were slightly injured.--last night a gang of guerrillas burned two houses, and stole several horses on the Kentucky side of the river, opposite Cairo, Ill.--the Mexican schooner Juanita, while attempting to evade the blockade, was captured and destroyed by the steamer Virginia, off San Luis Pass, Texas.--the schooner Three Brothers was captured in the Homasassa River, by the National vessel Nita.