The President of the United States announces to the country, that the news from the Army of the Potomac, up to ten o'clock P. M. of the third, is such as to cover the army with the highest honor--to promise great success to the cause of the Union--and to claim the condolence of all for the many gallant fallen; and that for this he especially desires that on this day, "He whose will, not ours, should ever be done," be everywhere remembered and reverenced with the profoundest gratitude. ABRAHAM LINCOLN. CHAPTER XIII. RETREAT OF THE REBELS FROM GETTYSBURG. 1863.--National Rejoicing.--The Enemy Retreating.--Feebly Pursued. --Reconnoissances.--Kilpatrick Gives the Enemy a Fourth of July Entertainment at Monterey Pass.--Storm and Terror.--Immense Train Destroyed, and Hosts of Prisoners Taken.--Pitiable Condition of Stuart's Cavalry.--Battle of Hagerstown.--Captains Penfield and Dahlgren Wounded.--Wonderful Exploits of a Union Scout.--Kilpatrick and Buford at Williamsport.--Cavalry Fight at Boonsboro'.--Stuart Defeated.--Hagerstown Retaken.--Orders to Advance, One Day Too Late. --Kilpatrick Chases the Flying Foe.--Fight at Falling Waters, Last Act in the Drama.--Great Bravery of Union Troops.--Last Vestige of the Invaders Wiped Out.--Bivouac and Rest. The victory at Gettysburg, though purchased at so dear a price, when announced to the people, produced a deep and widespread joy, which contributed to make the Fourth of July doubly memorable. The gallant behavior of our men furnished a theme for general exultation, and the removal of the threatened disaster foreshadowed in the pompous and successful invasion, made every true American breathe more freely. But the work of the soldier was not yet done. The feet of the invaders were still upon free soil; and though his ranks had been thinned by desertions, and by unprecedented casualties in battle, and he had been thwarted in all the important minutiae of his plan, he was still formidable, and compelled to fight with desperation, if attacked, to prevent utter destruction.