Gen. Hooker's plan embraced, besides a cavalry raid to sever the enemy's communications, a demonstration in force on the left to draw the enemy's attention, and the throwing of the main body of his forces across the river on the right.

As early as April 21, Doubleday of the First Corps had been sent down the river to Port Conway with some thirty-five hundred men, to light camp-fires, and make demonstrations with pontoons, after doing which he returned to camp. On the 23d Col. Morrow, with the Twenty-fourth Michigan, went down, and crossed the river to Port Royal in boats.

These demonstrations had been intended to co-operate with Stoneman's raid, which at these dates should have been well on Lee's rear, and to unsettle Lee's firm footing preparatory to the heavy blows Hooker was preparing to deliver; but, as Stoneman was delayed, these movements failed of much of their intended effect. Nevertheless, Jackson's corps was drawn down to the vicinity, and remained there some days.

On Monday, April 27, Hooker issues his orders to the First, Third, and Sixth Corps, to place themselves in position, ready to cross; the First at Pollock's Mills Creek, and the Sixth at Franklin's Crossing, by 3.30 A.M., on Wednesday; and the Third at a place enabling it to cross in support of either of the others at 4.30 A.M. The troops to remain concealed until the movement begins. Artillery to be posted by Gen. Hunt, Chief of Artillery of the army, to protect the crossing. Gen. Benham to have two bridges laid by 3.30 A.M. at each crossing. Troops, as needed, to be detailed to aid his engineer brigade.

Gen. Sedgwick to command the three corps, and make a demonstration in full force on Wednesday morning to secure the telegraph road. Should any considerable force be detached to meet the movement of the right wing, Sedgwick is to carry the works at all hazards. Should the enemy retreat towards Richmond, he is to pursue on the Bowling-Green road, fighting wherever he reaches them, while Hooker will pursue on parallel roads more to the west.

This order was punctually obeyed. Gen. Hunt placed forty-two guns at Franklin's, forty at Pollock's Mill, and sixteen at Traveller's Rest, a mile below, a number more being held in reserve. Those in position were so disposed as to "enfilade the rifle-pits, crush the fire of the enemy's works on the hill, cover the throwing of the bridges, and protect the crossing of the troops." (Hunt.)

These three corps camped that night without fires, and the pontoons were carried to the river by hand to insure secrecy.

At daybreak, Wednesday, Russell's brigade crossed in boats at Franklin's with little opposition. The bridges were then constructed; and Brooks's division passed over with a battery, and established itself strongly on the south side.

At the lower crossing, Reynolds's attempts to throw the bridges early in the morning were defeated by sharpshooters and a supporting regiment. But about half-past eight, the fog, which had been quite dense, lifted; and under fire of the artillery the Confederates were driven away, and the crossing made by Wadsworth.

During Wednesday and Thursday the entire command was held in readiness to force a passage at any time, the bridge-heads being held by Brooks and Wadsworth respectively.