...artment at Richmond: "Forty Jackson, 2 P. M., Oct. 12. --Last night I attacked the blockaders with my little fleet. I succeeded after a very short struggle in driving them all aground on the Southwest Pass Bar, except the Preble, which I sunk.--I captured a prize from them, and after I got them fast in the sand. I peppered them well. There were no casualties on our side. It was a complete su...