"I don't know," said the two officials.
"I do," said The Thinking Machine. "There are two--only two, Dunston, your receiving teller, and Miss Clarke."
"But they----"
"Dunston uses a violet perfume not _like_ that on the handkerchief, but _identical_ with it," The Thinking Machine went on. "Miss Clarke uses a strong rose perfume."
"But those two persons, above all others in the bank, I trust implicitly," said Mr. Fraser, earnestly. "And, besides, they wouldn't know how to blow a safe. The police tell me this was the work of experts."
"Have you, Mr. Fraser, attempted to raise, or have you raised lately, any large sum of money?" asked the scientist, suddenly.
"Well, yes," said the banker, "I have. For a week past I have tried to raise ninety thousand dollars on my personal account."
"And you, Mr. West?"
The face of the cashier flushed slightly--it might have been at the tone of the question--and there was the least pause.
"No," he answered finally.