In this companion to his earlier book, 'Gettysburg, the Second Day', the author provides the first definitive account of the fighting between the Army of the Potomac and Robert E. Lee's Army of Northern Virginia at Cemetery Hill and Culp's Hill - two of the most critical engagements fought at Gettysburg on 2 and 3 July 1863. He provides detailed tactical accounts of each stage of the contest and explores the interactions between - and decisions made by-generals on both sides.