February 1863. "Aquia Creek Landing, Virginia. Personnel in front of Quartermaster's Office. Photograph from the main Eastern theater of war, Burnside and Hooker, November 1862-April 1863." Wet plate glass negative by Alexander Gardner. View full size.

June 9, 1865. "Negro freedmen by canal -- group of Contrabands at Haxall's Mill, Richmond." Wet plate stereograph by Alexander Gardner. View full size.

        "President Abraham Lincoln delivered his Gettysburg Address at the dedication. Examination of the image in 2007 by members of the Center for Civil War Photography indicates that Lincoln may be visible in the crowd when viewed through magnification."

-- Library of Congress Prints & Photographs Division

November 19, 1863. "Dedication of Monument at Gettysburg, Pennsylvania." Wet plate glass negative by Alexander Gardner. View full size.

September 1862. "Antietam, Maryland. Confederate dead by a fence on the Hagerstown road." The first major battle of the Civil War on Union territory was fought 150 years ago this month. Wet plate glass negative. View full size.

February 1863. "Aquia Creek Landing, Virginia. Group of Commissary clerks." Wet plate glass negative by Alexander Gardner. View full size.

July 7, 1865. "Washington, D.C. Hanging hooded bodies of the four conspirators; crowd departing." Lincoln assassination conspirators Mary Surratt, Lewis Payne, David Herold and George Atzerodt shortly after their execution at Fort McNair. Wet plate glass negative by Alexander Gardner. View full size.

April 1865. "Washington Navy Yard, David E. Herold, Lincoln assassination conspirator." This 22-year-old accomplice of John Wilkes Booth was executed by hanging on July 7, 1865. Glass negative by Alexander Gardner. View full size.

Aquia Creek Landing, Virginia, circa 1863. "Federal Army. Clerks of the Commissary Depot by railroad car and packing cases." A somewhat unsettling scene. Wet plate glass negative by Alexander Gardner. View full size.

February 5, 1865. "Abraham Lincoln, seated, holding spectacles and a pencil." Glass transparency; photograph by Alexander Gardner. View full size.

April 1865. Richmond, Virginia. "Ruins of Gallego Mills." A water wheel in the Gallego flour mill on the James River after its destruction in the Great Fire of 1865, which consumed most of the buildings in Richmond's business district. Wet-plate glass negative by Alexander Gardner. View full size.

September 1862. Antietam, Maryland. "Confederate soldier who after being wounded had evidently dragged himself to a little ravine on the hillside where he died." Wet plate glass negative by Alexander Gardner. View full size.

Allan Pinkerton ("E.J. Allen") of the Secret Service on horseback. Antietam, Maryland, main eastern theater of the war, September-October 1862. Glass negative (wet collodion). View full size. Photograph by Alexander Gardner.

July 1863. Dead Confederate sharpshooter at the foot of Round Top. Gettysburg, Pennsylvania. View full size. Photograph by Alexander Gardner.

Gen. John F. Hartranft reading the death warrant to the four condemned Lincoln assassination conspirators (Mrs. Surratt, Payne, Herold, Atzerodt) on the scaffold at Fort McNair, Washington. July 7, 1865. View full size. Photograph by Alexander Gardner. More execution photos at GhostCowboy.

Lewis Payne, seated and manacled, at the Washington Navy Yard about the time of his 21st birthday in April 1865, three months before he was hanged as one of the Lincoln assassination conspirators. View full size. Photograph by Alexander Gardner, probably taken aboard the ironclad U.S.S. Montauk or Saugus.