On the 4th of July, the same day that Vicksburg surrendered, an attack was made upon Helena, in Arkansas, by the Confederates in force. The garrison at the same time numbered 4,000 men, the enemy were variously estimated at from 9,000 to 15,000. Having attacked the centre of the position, the Confederates carried the rifle-pits and a battery upon the hills, in rear of the town, which commanded all the other defensive works as well as the town itself. They then began pushing masses of troops down the hill, while their sharpshooters were picking off the artillerists in the main fort, called Fort Curtis. Guns had also been placed in commanding positions near the river, both above and below the town, and opened fire upon the line of defensive works across the river bottom, there about a thousand yards in width. Lieutenant-Commander Pritchett, of the Tyler, seeing how the assault was about to be made, placed his vessel in front of the town, so that her broadside played upon the enemy descending the hills, while their artillery above and below were exposed to her bow and stern guns. From this advantageous position the Tyler opened fire, and to her powerful battery and the judgment with which it was used must be mainly attributed the success of the day; for though the garrison fought with great gallantry and tenacity, they were outnumbered two to one. The enemy were driven back with great slaughter. General Prentiss, commanding the post, took occasion to acknowledge, in the fullest and most generous manner, Pritchett's care in previously acquainting himself with the character of the ground, as well as the assistance afterward rendered by him in the fight. Four hundred of the enemy were buried on the field and 1,100 were made prisoners.