There was a dead silence instantly, and Alice thought to herself, 'I
wonder what they WILL do next! If they had any sense, they'd take the
roof off.' After a minute or two, they began moving about again, and
Alice heard the Rabbit say, 'A barrowful will do, to begin with.'

'A barrowful of WHAT?' thought Alice; but she had not long to doubt,
for the next moment a shower of little pebbles came rattling in at the
window, and some of them hit her in the face. 'I'll put a stop to this,'
she said to herself, and shouted out, 'You'd better not do that again!'
which produced another dead silence.