"Oh, but you are so foolish!" she murmured. "Believe me, no person is really honest. We all live upon our neighbours. There is only one thing in life which is common to all religions—honour. By honour I mean fidelity to one's friends. Take that into your heart, dear Mr. Aaron Rodd, and you can hold your head as high as any man's on earth."

He stooped and kissed her fingers as she stood by the open door, an action, curiously enough, which he had never contemplated in his life before in connection with any woman, yet which seemed to him at that moment an entirely natural proceeding.

"That, at least," he promised, "is something which I can hold on to."

He descended the stairs, the clasp of her fingers still tingling on his, was handed from the grave major-domo, who guarded the hall, to another servant, and on to the footman, who summoned a taxicab for him. He gave the address of his office and was driven promptly off. A few yards from the corner of the Square, however, the taxicab slackened speed and stopped by the side of the pavement. Almost before he realised what was happening, the door was opened. An inspector, in uniform and peaked cap, let down the vacant seat and sat opposite to him. Mr. Paul Brodie, smoking a large cigar, followed and took the place by his side. The cab went on. Aaron Rodd remained stonily silent. The eyes of the two men were fixed upon the brown paper parcel which he had had no time to conceal.

"Sorry to take you out of your way, Mr. Rodd," Brodie said, with ponderous sarcasm, "but we just want you to call for a moment at the Marlborough Street police-station. In the meantime, you wouldn't care to tell us, I suppose, what you have in that small parcel you are holding so carefully?"

Aaron Rodd sat perfectly still. A chain of wild ideas flashed through his brain, only to be instantly dismissed. He thought of throwing the parcel out of the window, hurling himself upon the two men and making a fierce struggle for liberty. There was something ignominious in the facility of his capture, in the completeness of his failure. Yet he realised perfectly well that escape by any means was hopeless, that behaviour of any sort incompatible with his supposed position would be an instant confession of guilt.

"I am engaged on confidential business on behalf of a client," he announced stiffly, "and I cannot conceive what authority you have to delay me or to ask me questions."

Mr. Brodie nodded sympathetically.

"That's perfectly correct," he admitted, "perfectly correct."

Not another word was spoken until the cab drew up outside the police-station. Mr. Brodie paid the taxicab driver, and Aaron Rodd, with an escort on either side of him, crossed the pavement, passed through the bare stone hall and into a small waiting-room. A superintendent, who was writing at a desk, glanced up as they entered. Mr. Brodie leaned down and said a few words in his ear. The former nodded and turned to Aaron Rodd.