In the scene where the rats have "split open the kegs of salted sprats", the line "Send for Tybalt, the rat-catcher!" is heard. This is a reference to Mercutio's insult to Tybalt in Shakespeare's Romeo and Juliet, Act III, Scene 1. See more
But I'm on holiday! What's the point of being on holiday if you can't stay up?
That's a very clever argument, young Willie to be sure! And while I'm certain I can't answer it as you phrased it, put like that I see no reason why you shouldn't stay up until dawn, that's what holidays are for.