 Complete the following phrase:  An early example of tampering was in the early 1860s, when a photo was altered using the body from a portrait of John C. Calhoun and the head of Lincoln from a famous seated portrait by Mathew Brady  the same portrait which was the basis for the original Lincoln five-dollar bill. Another is exampled in the Library of Congress Prints and Photographs Online Catalogue wherein it exposes a manipulated American Civil War photograph of General Ulysses S. Grant posing horseback in front of his troops at City Point, Virginia. Close analysis of the photograph raises questions and reveal certain details in the photograph that indicate it has been manipulated. For example, Grants head is set at a strange angle to his body, his uniform is of a different time period, and his favorite horse Cincinnati did not have a left hind sock like the horse in the photograph, although his other horse Egypt did have a sock, but on a different foot. With further research, three different photographs were discovered that explained the composite using Grants head from one photograph, the body of Major General Alexander McDowell McCook atop his horse from another photograph, and for the background, a 1864 photograph of Confederate prisoners captured at the 