The Life and Death of Richard the Third — Act 3, Scene 5: The Tower-walls.

At the Tower, Gloucester and Buckingham arrive in shabby armor and rehearse frightened gestures for show. Catesby brings in the Lord Mayor, and Gloucester and Buckingham pretend to be alarmed by imagined enemies while Lovel and Ratcliff appear with Hastings’s head. Gloucester mourns Hastings as an old friend and claims he was forced to execute a dangerous traitor who had plotted against him. The Lord Mayor accepts this account and promises to tell the citizens. After he leaves, Gloucester sends Buckingham to Guildhall to argue that Edward’s children are illegitimate and to attack Edward’s morals. Gloucester then orders clerics to meet him at Baynard’s Castle and goes inside to hide Clarence’s children.