...sition in main ship channel, as near the shore as prudence would admit, and attempt to batter down the southeast angle and gorge-wall of Fort Sumter—for that was its most vulnerable part — General Beauregard , on the 4th of April, ordered the Commander of the First Military District to add a 10-inch columbiad, or a 42-pounder rifled gun, to the Cummings's Point Battery, the object being to keep the Federa...