The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 2: Two Years of Grim War.
Francis Trevelyan Miller, Ed.

Sickles found this ground low and disadvantageous as a fighting-place. In his front he saw the high ground along the ridge on the side of which the peach orchard was situated, and advanced his men to this position, placing them along the Emmitsburg road, and back toward the Trostle farm and the wheat-field, thus forming an angle at the peach orchard. The left flank of Hancock's line now rested far behind the right flank of Sickles' forces. The Third Corps was alone in its position in advance of the Federal line. The Confederate troops later marched along Sickles' front so that Longstreet's corps overlapped the left wing of the Union army. The Northerners grimly watched the bristling cannon and the files of men that faced them across the valley, as they waited for the battle to commence.

The boom of cannon from Longstreet's batteries announced the beginning of the second day's battle. Lee had ordered Longstreet to attack Sickles in full force. The fire was quickly answered by the Union troops, and before long the fight extended from the peach orchard through the wheat-field and along the whole line to the base of Little Round Top. The musketry commenced with stray volleys here and there — then more and faster, until there was one continuous roar, and no ear could distinguish one shot from another. Longstreet swept forward in a magnificent line of battle, a mile and a half long. He pressed back the Union infantry, and was seriously threatening the artillery.

At the extreme left, close to the Trostle house, Captain John Bigelow commanded the Ninth Battery, Massachusetts Light Artillery. He was ordered to hold his position at all hazards until reenforced. With double charges of grape and canister, again and again he tore great gaps in the advancing line, but it re-formed and pressed onward until the men in gray reached the muzzles of the Federal guns. Again Bigelow fired, but the heroic band had at last to give way to the increased numbers of the attack, which finally resulted in a hand-to-hand