From the Queen. An invitation for the Duchess to play croquet.

There’s no sort of use in knocking, and that for two reasons. First, because I’m on the same side of the door as you are; secondly, because they’re making such a noise inside, no one could possibly hear you.

There might be some sense in your knocking, if we had the door between us. For instance, if you were inside, you might knock, and I could let you out, you know.