I think I remained with him for nearly an hour. Then, after he had told me that his intention was to stay in England, at least for the present, I left him and walked back to my desolate home, where, Gwen having retired, I sat for a further hour in my den, deeply thinking.

That Kirk was in some secret way in association with the bogus Professor was plain. Was it not, then, more than likely that they would ere long meet again? If I kept a wary eye upon him, I might, I saw, discover something of great interest.

Who could this man be who led a dual existence for no apparent cause; this man who was narrow-minded and penurious in Bedford Park, yet was wealthy and open-handed in Whitehall Court?

As I calmly reviewed the whole extraordinary situation I saw that, in turn, I mistrusted the whole of the actors in that bewildering drama. Ethelwynn, the calm, sweet, clear-eyed girl, so content in her great love for Leonard Langton, though she had actually witnessed her father lying dead and cold, yet now refused to presume his death! Why? Doctor Flynn I disliked instinctively; Langton was evidently playing a double game, having denied all knowledge of Kirk, whereas the latter was his friend; Antonio and Pietro were away; while Kirk himself, silent and cunning, was pretending a complete ignorance which was only ill-feigned.

And the most important point of all was that not a breath of suspicion of the Professor’s death had yet leaked out to the public.

Thus, utterly bewildered, I again retired to rest.

Early astir next morning, I set watch upon Kirk’s movements, assisted by Dick Drake, my clean-shaven, bullet-headed chauffeur. A few moments before eleven he came forth, thinly clad and shabby, as he generally appeared in Chiswick, and, walking to Ravenscourt Park Station, took a third-class ticket to Westminster, whence he walked to a rather grimy house situate in Page Street, a poor neighbourhood lying behind the Abbey. There he remained for some time, after which, fearing lest he should recognise me, I directed Drake to follow him, and returned to the garage.

At six that evening my man returned, tired and hungry, reporting that Kirk had gone to a house in Foley Street, Tottenham Court Road, the number of which he gave me, and after ten minutes there he had eaten his luncheon at a bar in Oxford Street. Then he had taken train from Holborn Viaduct to Shortlands, near Bromley, where he had made a call at a small villa residence not far from the station.

The door of the house had been opened by a tall, thin man in a dark blue jersey, who, he said, had the appearance of a foreigner, and Kirk had stayed inside for nearly two hours. When at last he came out, the tall man had walked with him to the station, and bade him adieu on the platform.

“But,” added Drake, “that gentleman’s a pretty ’cute one, sir. He spotted me.”