This movement to the left, first detected by Sickles' skirmishers, was Longstreet getting into position for the attack that Lee had ordered. When Longstreet's guns should be heard, Ewell was to assault Culp's Hill and Cemetery Hill; while Hill, in the centre, was to follow up Longstreet's attack as it progressed from right to left. In short, a simultaneous assault on the two wings of Meade's army was to be connected by a second and cumulative wave gathering headway as it rolled on, until this billow of fire and steel should engulf and sweep the whole Union line out of existence. By this plan of battle Lee expected to disconcert any attempt to reinforce either flank, or should Meade dare weaken his centre for that purpose, Hill could then push in there, and cut the Union army in twain. Splendid conception! magnificent plan! none the less because too complicated for the execution of generals who either could not or would not comprehend what was required of them. Consoling thought, that not all the stupidity or blundering was on the Union side! Lee had pointed out the peach orchard to Longstreet, with the injunction that it should be seized first of all. [Sidenote: 3.30 P.M.] Though he had received his orders at eleven o'clock, it was not until after half-past three that Longstreet was ready to open the battle. Sluggish by nature, he was well described by his chief as slow to act: once in the thick of the fight, he rose with commanding power as the peerless fighter of that army; and in that part of the field where Longstreet fought, the dead always lay thickest. The confidence reposed in him by Lee is fully attested by the fact of his having assigned the conduct of the battles, both on the second and third, to General Longstreet. [Sidenote: Sickles' Idea.] We have seen how, after some hours of wavering, Sickles had at length decided to choose a new position for himself. Yesterday he had not been able to convince himself that it would be right to move his corps out of line, even that he might go to the aid of his immediate chief and when his doing so would have saved the day. Restrained then by the strict letter of his orders,[60] he had remained in a state of feverish uncertainty for some hours, though at length concluding to disobey them. To-day when he was without real responsibility, being now in the presence of the general commanding the army, Sickles sets both orders and chief at defiance. The acts of the two days are, however, in striking accord. Sickles disobeys orders in both instances. [Sidenote: The Third Corps moves out.]