Portrait of a Man Posing at the Entrance of a Mine Somewhere in the Pahranagat Valley of Nevada (1871)

Portrait of a man posing at the entrance of a mine somewhere in the Pahranagat Valley of Nevada, 1871. By Timothy O’Sullivan.

Source: National Archives and Records Administration.

Animated Stereoview Portrait of a US Army Soldier and His Family at Fort Garland, Colorado Territory (1874)

Animated stereoview portrait of a US Army soldier and his family at Fort Garland, Colorado Territory, 1874. By Timothy O'Sullivan.

Source: Library of Congress.

Portrait of a Union Army Telegraph Operator in a Camp During the Siege of Petersburg (1864)

Portrait of a Union Army telegraph operator in a camp during the Siege of Petersburg, Virginia, August 1864. By Timothy O’Sullivan.

Source.

Animated Stereoscopic Portrait of a Group of Zuni Native Americans Posing in Front of a Pueblo Building in Zuni Pueblo, New Mexico (1873)

Animated stereoscopic portrait of a group of Native Americans posing in front of a pueblo building in Zuni Pueblo, New Mexico, 1873. By Timothy O'Sullivan.

Source.
More information.

Portrait of Union Soldiers of the 1st Massachusetts Volunteer Cavalry Regiment Posing in Front of Tents in a Camp During the Siege of Petersburg in Virginia (1864)

Portrait of Union soldiers of the 1st Massachusetts Volunteer Cavalry Regiment posing in front of tents in a camp during the Siege of Petersburg in Virginia, August 1864. By Timothy O’Sullivan.

Source.

Portrait of a Group of Mohave Indians in Arizona Taken by Timothy O’Sullivan During the Wheeler Survey (1871)

Portrait of a group of Mohave Indians in Arizona taken by Timothy O’Sullivan during the Wheeler Survey, 1871.

Source.

View of a Line of Bodies of Dead Confederate Soldiers Gathered For Burial the Day After Fighting on Alsop's Farm During the Battle of Spotsylvania Court House (1864)

A line of bodies of dead Confederate soldiers gathered for burial the day after fighting on Alsop's Farm during the Battle of Spotsylvania Court House, May 20, 1864. By Timothy O'Sullivan. Animated stereoview.

Source.

Animated Stereoscopic Portrait of Three Apache Warriors Near Camp Apache, Arizona (1873)

"Apache Indians, as they appear ready for the war-path." Animated stereoscopic portrait of three Apache warriors near Camp Apache, Arizona, 1873. By Timothy O'Sullivan.

Source.

View of Union Troops Building a Pontoon Bridge Over the Port Royal Sound in Beaufort, South Carolina (1862)

View of Union troops building a pontoon bridge over the Port Royal Sound in Beaufort, South Carolina, March 1862. By Timothy O'Sullivan. Animated stereoview.

Source.

A Group of Union Officers Having a Meal in a Camp in Brandy Station, Virginia (1864)

A group of Union officers having a meal in a camp in Brandy Station, Virginia, April 1864. By Timothy O'Sullivan. Animated stereoview.

Source.
More information.

View of a Recently Destroyed Richmond, Fredericksburg, and Potomac Railroad Bridge Over the North Anna River in Virginia (1864)

View of a recently destroyed Richmond, Fredericksburg, and Potomac Railroad bridge over the North Anna River in Virginia, May 25, 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

Source.

Union Soldiers Posing Next to U.S. Army Corps of Engineers Ambulance Wagons Near Falmouth, Virginia (1863)

Union soldiers posing next to U.S. Army Corps of Engineers ambulance wagons near Falmouth, Virginia, April 1863. By Timothy O'Sullivan. Animated stereoscopic photographs.

Source.

Union Soldiers Guarding the Chesterfield Bridge Over the North Anna River in Virginia (1864)

Union soldiers guarding the Chesterfield Bridge over the North Anna River in Virginia, May 23, 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

Source.

Portrait of Two Union Telegraph Operators at a Headquarters During the Siege of Petersburg Near Petersburg, Virginia (1864)

Portrait of two Union telegraph operators at a headquarters during the Siege of Petersburg near Petersburg, Virginia, August 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

Source.

View of a Pontoon Bridge Built by the 50th New York Engineer Regiment Over the Pamunkey River at Nelson's Crossing, Virginia (1864)

View of a pontoon bridge built by the 50th New York Engineer Regiment over the Pamunkey River at Nelson's Crossing, Virginia, May 1864. The head of an unidentified man is visible in the foreground. By Timothy O'Sullivan. Animated stereoscopic photographs.

Source.

A Group of Union Telegraph Operators Drinking in Their Quarters Situated Near the Headquarters of the Army of the Potomac During the Siege of Petersburg

A group of Union telegraph operators drinking in their quarters situated near the headquarters of the Army of the Potomac during the Siege of Petersburg near Petersburg, Virginia. By Timothy O’Sullivan. Animated stereoscopic photographs.

Source.

Union Soldiers Posing in a Captured Confederate Encampment During the Siege of Petersburg Near Petersburg, Virginia (1864)

Union soldiers posing in a captured Confederate encampment during the Siege of Petersburg near Petersburg, Virginia, June 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

Source.

Time-Lapse View of Union Wharves and Supply Boats at City Point, Virginia, Shortly After the Explosion of a Large Amount of Ordnance Which was Sparked by a Confederate Saboteur (1864)

Time-lapse view of Union wharves and supply boats at City Point, Virginia, shortly after the explosion of a large amount of ordnance which was sparked by a Confederate saboteur, August 1864. By Timothy O'Sullivan.

Source 1.
Source 2.
More information.

A Bombproof Eatery Named the "Fruit & Oyster House" Built by a Sutler During the Siege of Petersburg, Virginia (1864)

An unidentified man posing in front of a bombproof eatery set up by a sutler during the Siege of Petersburg, Virginia, c. 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

Source.

Two Group Portraits of Union Officers of the 60th New York Volunteer Infantry Regiment Posing at Fauquier Sulfur Springs, Virginia (1862)

Two group portraits of Union officers of the 60th New York Volunteer Infantry Regiment posing at Fauquier Sulfur Springs, Virginia, August 1862. By Timothy O'Sullivan. Animated stereoscopic photographs.

Source 1.
Source 2.