"Put it away! Put it away at once!" said Lupin very smartly. "You're not to use it. You're not to use it on any account! You understand?"
"Yes," said the policeman firmly; and with a slightly bewildered air he put the revolver away.
"Here! Stand here!" cried Lupin, raising his voice. And he caught the policeman's arm, and hustled him roughly to the front of the doors of the lift-well. "Do you see these doors? Do you see them?" he snapped.
"Yes, yes," said the policeman, glaring at them.
"They're the doors of a lift," said Lupin. "In that lift are Dieusy and Lupin. You know Dieusy?"
"Yes, yes," said the policeman.
"There are only Dieusy and Lupin in the lift. They are struggling together. You can hear them," shouted Lupin in the policeman's ear. "Lupin is disguised. You understand—Dieusy and a disguised man are in the lift. The disguised man is Lupin. Directly the lift descends and the doors open, throw yourself on him! Hold him! Shout for assistance!" He almost bellowed the last words into the policeman's ear.
"Yes, yes," said the policeman. And he
