The same day, April 30th, a feigned attack was made at Haines's Bluff by the vessels of the squadron remaining above Vicksburg, under Lieutenant-Commander K.R. Breese, in conjunction with the Fifteenth Army Corps, under General W.T. Sherman. The object of General Grant in ordering this demonstration was to hinder the Confederates at Vicksburg from sending heavy reinforcements to Grand Gulf to oppose the troops on their first landing. The expedition was most successful in attaining this end, but the vessels were very roughly handled, having been much exposed with the wish to make the attack appear as real as possible. The Choctaw, Lieutenant-Commander F.M. Ramsay, was struck as often as forty-six times. Despite the heavy fire of the enemy, no serious casualties occurred on board the fleet in an action which lasted three hours, from 11 A.M. to 2 P.M. The demonstration was continued during the following day, but at 8 P.M. General Sherman withdrew his troops to the other side of the Mississippi, taking up his march to join the main body of the army; and the vessels returned to their anchorage off the mouth of the Yazoo. On the morning of the 3d Porter advanced upon Grand Gulf with his fleet below, intending to attack if the enemy were still there; but the place was found to be evacuated, as had been expected, the march of the army inland having rendered it untenable. The earthworks were torn to pieces by the fire of the fleet, and Colonel Wade, the commandant, had been killed; but the guns were still in position, except two 32-pounders in the lower battery, which were dismounted and broken. A large quantity of ammunition was also obtained, showing that lack of it was not the cause of the fire slackening on the 29th of April. The same day General Grant arrived, and made the necessary arrangements for transferring his base of supplies to Grand Gulf instead of Bruinsburg. On the day that Porter ran by the batteries of Vicksburg, April 16th, Farragut, having received his secretary and the despatches brought by him, went back from Port Hudson to the mouth of the Red River. During the next fortnight he kept up the blockade of the Mississippi between those two points, twice catching stores crossing in flat-boats, besides destroying a number of boats along the river and a large quantity of commissary stores at Bayou Sara. Besides cutting off Port Hudson from the west bank of the Mississippi, his presence in this position prevented reinforcements from that place being sent by the Red River, as they otherwise might have been, to the Confederate General Taylor, who was now being pressed by Banks toward Alexandria. Farragut had also in view blockading the Black River, a tributary of the Red, which enters it from the north and northwest about thirty miles from the Mississippi and by which it was reported that reinforcements to Taylor were expected to arrive from Arkansas.