After Merritt had crossed the Chickahominy and reached Mechanicsville, I sent him orders to push on to Gaines’s Mills.  Near the latter place he fell in with the enemy’s cavalry again, and sending me word, about 4 o’clock in the afternoon I crossed the Chickahominy with Wilson and Gregg, but when we overtook Merritt he had already brushed the Confederates away, and my whole command went into camp between Walnut Grove and Gaines’s Mills.

The main purposes of the expedition had now been executed.  They were “to break up General Lee’s railroad communications, destroy such depots of supplies as could be found in his rear, and to defeat General Stuart’s cavalry.”  Many miles of the Virginia Central and of the, Richmond and Fredericksburg railroads were broken up, and several of the bridges on each burnt.  At Beaver Dam, Ashland, and other places, about two millions of rations had been captured and destroyed.  The most important of all, however, was the defeat of Stuart.  Since the beginning of the war this general had distinguished himself by his management of the Confederate mounted force.  Under him the cavalry of Lee’s army had been nurtured, and had acquired such prestige that it thought itself well-nigh invincible; indeed, in the early years of the war it had proved to be so.  This was now dispelled by the successful march we had made in Lee’s rear; and the discomfiture of Stuart at Yellow Tavern had inflicted a blow from which entire recovery was impossible.

In its effect on the Confederate cause the defeat of Stuart was most disheartening, but his death was even a greater calamity, as is evidenced by the words of a Confederate writer (Cooke), who says:  “Stuart could be ill spared at this critical moment, and General Lee was plunged into the deepest melancholy at the intelligence of his death.  When it reached him he retired from those around him, and remained for some time communing with his own heart and memory.  When one of his staff entered and spoke of Stuart, General Lee said:  ’I can scarcely think of him without weeping.’”

From the camp near Gaines’s Mills I resumed the march to Haxall’s Landing, the point on the James River contemplated in my instructions where I was to obtain supplies from General Butler.  We got to the James on the 14th with all our wounded and a large number of prisoners, and camped between Haxall’s and Shirley.  The prisoners, as well as the captured guns, were turned over to General Butler’s provost-marshal, and our wounded were quickly and kindly cared for by his surgeons.  Ample supplies, also, in the way of forage and rations, were furnished us by General Butler, and the work of refitting for our return to the Army of the Potomac was vigorously pushed.  By the 17th all was ready, and having learned by scouting parties sent in the direction of Richmond and as far as Newmarket that the enemy’s cavalry was returning to Lee’s army I started that evening on my return march, crossing the Chickahominy at Jones’s bridge, and bivouacking on the 19th near Baltimore crossroads.