...Malvern; and, at eight o'clock, General Butler departed for the latter in his gig to confer with Admiral Porter. On his return, he announced that it was intended to explode the floating mine, near Fort Fisher , at one o'clock in the morning, and to land the troops for attack, if possible, soon after the dawn of day. The floating mine, or powder-ship, was a propeller of two hundred and ninety-five tons...