From the extreme left, after the northern slope of Mount Pleasant had been gained, a main approach was extended from the flank of Roy's battery of 20-pounder Parrotts, No. 20, almost directly toward the river, until the trench cut the edge of the bluff, forming meanwhile a covered way that connected all the batteries looking north from the left flank. Of these No. 24 was the seventeen-gun battery, including two 9-inch Dahlgrens removed from the naval battery of the right wing, and commanded by Ensign Swann. On the 2d of July, Lieutenant-Commander Terry took command of the _Richmond_ and turned over the command of the right naval battery to Ensign Shepard. These "blue-jacket" batteries, with their trim and alert gun crews, were always bright spots in the sombre line. From the river bank the sap ran with five stretches of fifty or sixty yards, forming four sharp elbows, to the foot and well up the slope of the steep hill on the opposite side of the ravine, where the Confederates had constructed the strong work known to both combatants as the Citadel. From the head of the sap to the nearest point of the Confederate works the distance was about ninety-five yards. From the ravine in front of the mortar battery of the left wing, No. 18, a secondary approach was carried to a parallel facing the advanced lunette, No. XXVII., and distant from it 375 yards. The object of this approach was partly to amuse the enemy, partly to prevent his breaking through the line, now drawn out very thin, and partly also to serve as a foothold for a column of attack in case of need. From the ravine near Slaughter's house a zigzag, constructed by the men of the 21st Maine, under the immediate direction of Colonel Johnson, led to the position of battery No. 16, where were posted the ten guns of Rails and Baines. The distance from this battery to the defences was four hundred yards. On the 15th of June, on the heels of the bloody repulse of the previous day, Banks issued a general order congratulating his troops upon the steady advance made upon the enemy's works, and expressed his confidence in an immediate and triumphant issue of the contest: "We are at all points on the threshold of his fortifications," the order continues. "Only one more advance, and they are ours! "For the last duty that victory imposes, the Commanding General summons the bold men of the corps to the organization of a storming column of a thousand men, to vindicate the flag of the Union, and the memory of its defenders who have fallen! Let them come forward! "Officers who lead the column of victory in this last assault may be assured of the just recognition of their services by promotion; and every officer and soldier who shares its perils and its glory shall receive a medal to commemorate the first great success of the campaign of 1863 for the freedom of the Mississippi. His name will be placed in General Orders upon the Roll of Honor."