The rebels in Pennsylvania--Panic at Harrisburgh--Alarm at Baltimore and Washington--Sixth corps leaves Bristow Station--A surprise--General Meade takes command--Position of the army--Marching through Pennsylvania--An unprecedented march--Exciting news--Battle of Gettysburgh--Death of Reynolds--First and Eleventh corps fall back --Second day's battle--The battle-field--Fighting at Round Top--On the right--The grand onset--The battle decided--Rebel and Union wounded. Chapter XX. Pursuit of Lee's Army. Scenes of the field of Gettysburgh--The rebel hospitals--The sightless rebel soldier boy--The Sixth corps at Fairfield--"Hurrah for the Union"--Kilpatrick's handiwork--At Waynesboro'--On picket--A division of militia--The Vermonters at Funkstown--The army at Funkstown--Meade's failure to attack--New York riots--Return to Virginia. Chapter XXI. Camps at Warrenton, the Centreville Campaign and the Battle of Rappahannock Station. Camp at Hart's Mills--A ride to the Sulphur Springs--Contrabands going north--The Vermonters go to New York--Jersey Brigade at Warrenton--The Sixth corps at Cedar Mountain--Retreat to Centreville--Battle of Bristoe Station--Advance to Warrenton--Battle of Rappahannock Station--Flight of Lee's army. Chapter XXII. The Army at Brandy Station. Encampment at Brandy Station--The Mine Run campaign--Crossing the Rapidan--Battle of Locust Grove--The army on Mine Run--The order of battle--The army withdraws--Back at Brandy Station--Reconnoissance to Madison Court House--Ladies in camp--Chapel tents. Chapter XXIII. The Wilderness Campaign. Preparing to leave camp--General Grant in command--The last advance across the Rapidan--The battle-ground--Battle of the Wilderness--Noble fight of Getty's division--Hancock's fight on the left--Rickett's division driven back--The ground retaken--The wounded--Duties of the surgeons--The noble dead. Chapter XXIV. Spottsylvania. Moving by the flank--The wounded abandoned--The Fifth Corps at Spottsylvania--Arrival of the Sixth Corps--Getting into line--Death of Sedgwick--General Wright in command--Battle of the 10th of May--Upton's splendid charge--Battle at "the angle"--Another flank movement. Chapter XXV. The Hospitals at Fredericksburgh. The journey from the battle-field--Sufferings of the wounded--A surgeon's letters--Rebel hatred--Assistance from the north--A father in search of his boy--The wounded sent to Washington. Chapter XXVI. Coal Harbor. At Hanover Court House--The Eighteenth corps joins the Army of the Potomac--The armies meet at Coal Harbor--Battle of June 1st--Battle of June 3d--Terrible exposure--The army strikes for Petersburgh--Charles City Court House--A centenarian--Review of the overland campaign. Chapter XXVII. Petersburgh. The march to Petersburgh--Smith's successes--The battle of June 18th--The Sixth and Second corps sent to the left--Rebels penetrate the line--Progress of the siege--Sixth corps proceeds to Reams' Station--Kautz's and Wilson's raids.