THE TOWER OF LONDON: TRAITORS' GATE.
Below St. Thomas's Tower is the stone archway with a strong double gate, known as the Traitor's Gate, which may be seen by anyone passing up or down the Thames. This famous entrance to the Tower was used for the admission of State prisoners who were brought hither by water. Could the stones of this gate speak, what grim stories they would tell of those who passed through to life-long imprisonment or death - the just and the unjust! The flight of steps from the Traitor's Gate leads to the Bloody Tower (one of the twelve towers of the Inner Ward), where the sons of Edward IV. are supposed to have been murdered and Raleigh spent the greater part of his fourteen years' imprisonment. Our picture shows the Gate open, but guarded by one of the "Beef-eaters."
source: The Queen's London : a Pictorial and Descriptive Record of the Streets, Buildings, Parks and Scenery of the Great Metropolis, 1896