... Two transports also were sunk, and the imperfect obstruction thus created was completed about daylight. During the night a small rifled Parrott gun was placed in position four hundred yards below Dunnington 's battery, under Midshipman F. M. Roby. Two rifled Parrott 8-pounders were also moved up soon after daylight, and placed near Roby's gun, and the three guns were manned by the crew of the Maurepas, a...