...ral A. P. Hill was to cross the Chickahominy, to the north side, at the meadow bridges, above Mechanicsville, and associating to himself Branch's brigade, which was to advance so soon as the march of General Jackson opened a way for it, was to sweep down against the enemy's right. As soon as the Mechanicsville bridge should be uncovered, Longstreet and D. H. Hill were to cross, the latter to proceed to the sup...