As he spoke I pondered. Was it possible that he was unaware of the surveillance I had kept upon him during and after his secret interview with Gabrielle? If so, why had he entered that dingy house in the Euston Road and made his exit by the back way? I had established the fact that the house was well-known to thieves of a certain class who used it in order to escape being followed. Several such houses exist in London. One is near the Elephant and Castle, another in the Clapham Road, while there is one in Hammersmith Road, and still another just off Clarence Terrace at Regent’s Park. Such houses serve as sanctuaries for those escaping from justice. The latter know them, and as they slip through they pay a toll, well-knowing that the keeper of the house will deny that they have ever been there.
The “in-and-out” houses of London and their keepers, always sly crooks, form a particular study in themselves. One pretends to be a garage, another a private hotel, a third a small greengrocer’s, and a fourth a boot repairer’s. All those trades are carried on as “blinds.” The public believe them to be honest businesses, but there is far more business done in concealing those wanted by the police than in anything else.
From Suzor’s demeanour I felt that he did not suspect me of having been witness of his entry into that frowsy house near Euston Station. But why had he gone there? He must have feared that he might be watched. And why? The only answer to that question was that he had met Gabrielle clandestinely and feared lest afterwards he might be followed.
But why should he fear if not implicated in the plot?
To me it now seemed plain that I had been marked down as a pawn in the game prior to that day when we travelled together from York to London. I had not altogether recovered from the effect of what had been administered to me. Often I felt a curious sensation of dizziness and of overwhelming depression, which I knew was the after effects of that loss of all sense of my surroundings when I had been taken to the hospital in St. Malo. I had been found at the roadside in France, just as Gabrielle had been found on the highway near Petersfield.
When I reflected my blood boiled.
The affable and highly cultured Frenchman presented a further enigma. He was crossing back to Paris next day. What if I, too, went back to Paris and watched his further movements? As I sat chatting and laughing with him, I decided upon this course.
When, shortly afterwards, I left, I went straight across Hammersmith Bridge and found that Harry Hambledon had just returned from his office.
We sat together at table, whereupon I told him one or two facts I had discovered, and urged him to cross to Paris with me next day.