...n effective of about 25,000 men, General Beauregard, at daybreak on the 15th, should attack Butler on his right flank, so as to cut him off from communication with his base at Bermuda Hundreds; while General Whiting , with some 4000 men, moving simultaneously from Port Walthall Junction, should strike Butler's right rear, press him back upon the James River above Drury's Bluff, and force him to surrender by noon ...