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.