“Perhaps not,” she retorted, “but can’t you see the difference? I wouldn’t take a penny of your money from you as a gift, but I haven’t the least compunction in taking my share of what you will have to pay for your freedom.”

“I see,” Jacob murmured. “This requires consideration.”

Mason glanced at his watch.

“It is now,” he said, “a quarter past three. The banks close at four. If you want to avoid spending the night here, you’ll sign that cheque right away.”

“What happens then?” Jacob enquired.

“Miss Bultiwell will cash it at the bank, will bring the proceeds here, and in a couple of hours’ time you will be able to leave.”

“And what do you suppose my next proceeding will be?” Jacob asked.

“In an ordinary way you would go straight to Scotland Yard, I suppose,” Mason replied. “As a matter of fact, however, we are rather gambling upon the idea that, with Miss Bultiwell’s name on the cheque, and taking into consideration the fact that she is going to cash it in person, you may prefer to treat the matter as a little duel in wits in which you have been worsted, and accept the consequences like a sportsman.”

“I see,” Jacob murmured. “But supposing, even at the risk of involving Miss Bultiwell, I go to Scotland Yard?”

“Then the only person whom Scotland Yard could possibly lay their hands on would be the young lady herself,” Mason pointed out. “Hartwell and I years ago learnt the secret of disappearing from London, and I can promise you that no Scotland Yard man will lay a hand on us.”