Why should she write to Edmund? Might not you
Transport her purposes by word?
Belike, Something – I know not what:
I’ll love thee much,
Let me unseal the letter.

– William Shakespeare

King Lear, Act 4, Scene 5. Oswald is carrying a love letter to Edmund from Goneril. Here Regan, who wants Edmund for herself, tries to persuade Oswald to allow her to open the letter, promising him sexual favors in return.