"Hot water, please," said Lupin.
The other looked at him with an air of mingled amazement and rage.
"Oh," said Lupin, "and a bath-towel! By Jove, there's no bath-towel!"
The man growled:
"You're getting at me, aren't you? You'd better be careful!"
He was going away, when Lupin caught him roughly by the arm:
"Here! A hundred francs if you'll post a letter for me."
He took out a hundred-franc note, which he had concealed during the search, and offered it to him.
"Where's the letter?" said the warder, taking the money.
"Just give me a moment to write it."