Seeing myself committed to an unpleasant business, I slipped out of the doorway and detected the woman five or six yards away hurrying in the direction of Piccadilly. I had no difficulty in following her, for she was evidently unsuspicious of my presence, and when presently she mounted a westward-bound 'bus I did likewise, but while she got inside I went on top, and occupied a seat on the near side whence I could observe anyone leaving the vehicle.

If I had not known Paul Harley so well I should have counted the whole business a ridiculous farce, but recognizing that something underlay these seemingly trivial and disconnected episodes, I lighted a cigarette and resigned myself to circumstance.

At Hyde Park Corner I saw the woman descending, and when presently she walked up Hamilton Place I was not far behind her. At the door of an imposing mansion she stopped, and in response to a ring of the bell the door was opened by a footman, and the woman hurried in. Evidently she was an inmate of the establishment; and conceiving that my duty was done when I had noted the number of the house, I retraced my steps to the corner; and, hailing a taxicab, returned to the Cafe Dame.

On inquiring of the same waiter whom Harley had accosted whether my friend was there:

“I think a gentleman is upstairs with Mr. Meyer,” said the man.

“In his office?”

“Yes, sir.”

Thereupon I mounted the stairs and before a half-open door paused. Harley's voice was audible within, and therefore I knocked and entered.

I discovered Harley standing by an American desk. Beside him in a revolving chair which, with the desk, constituted the principal furniture of a tiny office, sat a man in a dress-suit which had palpably not been made for him. He had a sullen and suspiciously Teutonic cast of countenance, and he was engaged in a voluble but hardly intelligible speech as I entered.

“Ha, Knox!” said Harley, glancing over his shoulder, “did you manage?”