Union soldiers on boxcars at railroad depot next to offices of the Atlanta Intelligencer during the city's occupation by General Sherman. View full size. Wet plate glass negative by George Barnard. Alternate view here.

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.

Three views of Lewis Payne (a.k.a. Lewis Powell) in April 1865, three months before his execution by hanging, wearing the same sweater. View full size. Photographs (wet collodion, glass plate) by Alexander Gardner.

The New York Public Library as seen from the intersection of East 42nd Street and Fifth Avenue. July 14, 1915. Copyright Office Collection. View full size.

Union Army guard at Price, Birch & Co. slave pen at Alexandria, Virginia, circa 1865. Detail of albumen print. View full size. Photograph by Andrew J. Russell.

Exterior view of Price, Birch & Co. slave pen at Alexandria, Virginia, circa 1865. Wet collodion, half of glass plate stereograph pair. View full size.

Interior view showing cells of Price, Birch & Co. slave pen at Alexandria, Virginia, circa 1865. Wet collodion, half of glass plate stereograph pair. View full size.

Price, Birch slave pen cells at Alexandria, Virginia, circa 1865. Wet collodion, half of glass plate stereograph pair. View full size.

Price, Birch slave pen at Alexandria c. 1865. Half of stereo pair. View full size.

Wall Street east from Nassau Street, 1911. View full size. Irving Underhill.

March 1936. "One-room hut housing a family of nine built on the chassis of an abandoned Ford in a field between Camden and Bruceton, Tennessee, near the river." 35mm nitrate negative by Carl Mydans. View full size.

A hobo jungle along the riverfront in St. Louis, Missouri. March 1936. Medium format nitrate negative by Arthur Rothstein. View full size.

Re-tiring a locomotive driver wheel in the Atchison, Topeka, & Santa Fe railway shops at Shopton, near Fort Madison, Iowa. March 1943. View full size. 4x5 Kodachrome transparency by Jack Delano.

Magazine and cannonballs at Battery Rodgers, Alexandria, defending Washington during the Civil War, circa 1863. View full size. Half of stereograph pair.

Boston Nationals shortstop Walter "Rabbit" Maranville, twenty-one years old. April 12, 1913. View full size. George Grantham Bain Collection.