King Henry VI, Part 3 (V.vi.57): The murder of Henry VI by Richard of Gloucester, 1709.

This illustration seems to show a plausible staging of the scene from Nicholas Rowe's edition of Shakespeare's works (1709). In Colley Cibber's version of Richard III, this scene opens that play, and perhaps this adaptation invited a possible staging, though the scene was banned from Cibber's performances. Note the full 17th c. wig worn by Henry.