I mustn't come here. Mustn't come to a fine house like this. Mustn't. Mustn't.
[He draws near it reluctantly. He puts his hand to the bell and withdraws it. Then he rings and snatches his hand away. He prepares to run away. Finally he rings it repeatedly, feverishly, violently.
Enter LIZA, opening the door.]
LIZA
Ullo, 'Oo's this!
JOHN
I oughtn't to have rung, miss, I know. I oughtn't to have rung your bell; but I've seen better days, and wondered if—I wondered...
LIZA
I oughtn't to 'ave opened the door, that's wot I oughtn't. Now I look at you, I oughtn't to 'ave opened it. Wot does you want?
JOHN