James Longstreet's countermarch and Samuel Johnston's morning reconnaissance are two of the most enigmatic events of the Battle of Gettysburg. Both have been viewed as major factors in the Confederacy's loss of the battle and, in turn, the war. Yet much of it lies shrouded in mystery. Though the battle is one of the most well-documented events in history, the vast majority of our knowledge comes from the words of the veterans and civilians who experienced it. Without action photography, video, or audio recordings, our primary window into what happened is the memory of those who were there. The story of the Battle of Gettysburg is simply the compilation of the memories of those who fought it. But memory is anything but objective. Recognizing the multitude of factors that affect human memory, In the Shadow of the Round Tops explores how the individual soldiers experienced, remembered, and wrote about the battle, and how those memories have created a cloud over James Longstreet's bewildering countermarch and Samuel Johnston's infamous reconnaissance. Each soldier had a particular view of these historic events. By comparing the veterans' memories and sifting through the factors that affected each memory, the picture of the countermarch, reconnaissance, and the entire battle, comes into sharper focus.