She slipped a key into the lock and tried to turn it.

It would not turn; and she bent down to look at it.
"Why--why, some one's been tampering with the lock! It's broken!" she cried.
"I told you I'd seen a burglar!" cried the millionaire triumphantly.
"He was after the keys." Sonia drew back the flap of the bureau and hastily pulled open the drawer in which the keys had been.
"They're here!" she cried, taking them out of the drawer and holding them up.
"Then I was just in time," said the millionaire.

"I startled him in the very act of stealing the keys." "I withdraw! I withdraw!" said the Duke.

"You did see a burglar, evidently.

But still I believe he was greenish-pink.