Before you fight the battle, ope this letter.
If you have victory, let the trumpet sound
For him that brought it. Wretched though I seem,
I can produce a champion that will prove
What is avouchèd there.

– William Shakespeare

King Lear, Act 5, Scene 1. At war breaks out between England and France, the still disguised Edgar hands Albany the letter Goneril wrote to Edmund asking for her husband Albany to be murdered.