"Instead of attacking Lee in this position, with the swollen waters of the Potomac in his rear, without any means of crossing his artillery, and when a defeat must have caused the surrender of his entire army, he was allowed time to construct a pontoon bridge with lumber collected from canal-boats and the ruins of wooden houses, and on the morning of the 14th his army had crossed to the south side of the river. His rear-guard, however, was attacked by our cavalry and suffered considerable loss. Thus ended the rebel campaign north of the Potomac, from which important political and military results had been expected. Our own loss in this short campaign had been very severe; namely, 2,834 killed, 13,709 wounded, and 6,643 missing--in all, 23,182. We captured 3 guns, 41 standards, 13,621 prisoners, 28,178 small-arms." The Confederate losses, considering that they were always the assailants, must have exceeded these figures.[84] As it is well known that Pickett's losses were suppressed by Lee's order, any compilation must be necessarily incomplete. Ten whole days thus elapsed from the time Lee fell back defeated from Cemetery Ridge until he recrossed the Potomac. He had brought off his army, his plunder, with upward of four thousand Union prisoners, by his opponent's leave, as one might say. There is a saying that a British army may be gleaned in a retreat, but not reaped. So far, in this war, barren victories had been the rule, and fruitful ones the rare exception. We do not find much to say in praise of a retreat that was nowhere seriously molested. It has, we know, been lauded as a marvel of skill. Lee's patience alone was severely tested. The crossing of the Potomac was effected without hinderance in the presence of Meade's whole army, partly by the bridge at Falling Waters, partly by the fords at Williamsport. True, the Union cavalry did a great deal of hard riding and scouting; but it, too, failed to destroy Lee's trains on the 6th, when it was in its power to have done so, and, in all probability, compelled his surrender. [75] Lee's cavalry had also left its menacing post in the Union rear. [76] It has been claimed that the Union right was too much disordered for a counter-attack, and that one on the left was impracticable. [77] Meade sent his cavalry out, not in a body, but in detachments, on the morning of the 4th. Gregg was ordered to the Chambersburg road, Kilpatrick to the Hagerstown, and Buford to Williamsport, by way of Frederick. Kilpatrick attacked and dispersed the small force then guarding the Monterey Pass that evening, but no steps seem to have been taken for holding it, and Kilpatrick therefore went on over the mountains next day in pursuit of the enemy's trains. We observe, in this connection, that Lee threw every sabre he had into Meade's rear in anticipation of his retreat on July 3d.