"We have heard startling accounts of the prodigies of valor performed by Stuart's Cavalry in Virginia, and the bands of Morgan in the West. That they showed true valor, nice discretion, and great powers of endurance, we will not for a moment question. But the exploits of our cavalry, in the late expedition in the rear of Lee's army, surpasses any thing ever achieved on this continent. Especially are the adventures of the Second New York (Harris Light Cavalry) and the Twelfth Illinois almost incredible. But they bear with them trophies that fully confirm the record of their daring. "They penetrated within the outer lines of fortification at Richmond, to within less than two miles of the city, and captured prisoners and trophies there. They cut all the communications between that city and Lee's army, travelled two hundred miles, and lost only thirty men. Many of them have changed horses a number of times on the route. Whenever theirs got tired, they laid hold of any thing that came in their way that suited them better. The contrabands flocked to them from every quarter. They would take their masters' teams from the plough and their best horses from the stables. Some of them were almost frantic with delight on the appearance of the Yankees. Over three hundred found their way to this place. Their services are all needed at this present time." The following report of Brigadier-General King will be read with interest: YORKTOWN, Virginia, May 7, 1863. _To Major-General Halleck_: Colonel Kilpatrick, with his regiment (the Harris Light Cavalry) and the rest of the Twelfth Illinois, have just arrived at Gloucester Point, opposite this post. They burned the bridges over the Chickahominy, destroyed three large trains of provisions in the rear of Lee's army, drove in the Rebel pickets to within two miles of Richmond, and have lost only one lieutenant and thirty men, having captured and paroled upwards of three hundred prisoners. Among the prisoners was an aid of General Winder, who was captured with his escort far within the entrenchments outside of Richmond. The cavalry have marched nearly two hundred miles since the third of May. They were inside of the fortifications of Richmond on the fourth; burnt all the stores at Aylett's Station, on the Mattapony, on the fifth; destroyed all the ferries over the Pamunkey and Mattapony, and a large depot of commissary stores near and above the Rappahannock, and came here in good condition. They deserve great credit for what they have done. It is one of the finest feats of the war. RUFUS KING, _Brigadier-General Commanding Post_. Another print contained the following remarks: