bushes the roar of the powerful engine was
growing dim in the distance!

I was detected. I had to deal with dangerously clever people.

CHAPTER II

BAITING THE TRAP

The following morning I spent at home, in my modest rooms, reviewing
my position and endeavouring to adjust my plans in accordance with the
latest development. "The Scorpion" had scored a point. What had aroused
the suspicions "Le Balafre," I knew not; but I was inclined to think
that he had been looking from some window or peep-hole in the narrow
street with the wooden houses when I had, injudiciously, followed him
there.

On the other hand, the leakage might be in Paris--or in my
correspondence system. The man of the scar might have been looking for
me as I was looking for him. That he was looking for someone on the
cross-channel boat I had not doubted.

He was aware, then that Charles Malet, cabman, was watching him. But
was he aware that Charles Malet was Gaston Max? And did he know where
I lived? Also--did he perchance think that my meeting with Dr. Stuart
in Limehouse had been prearranged? Clearly he had seen Dr. Stuart
enter my cab, for he had pursued us to Battersea.

This course of reflection presently led me to a plan. It was a
dangerous plan, but I doubted if I should ever find myself in greater
danger than I was already. _Nom d'un nom!_ I had not forgotten the
poor Jean Sach!

That night, well knowing that I carried my life in my hands, I drove
again to Limehouse Town Hall, and again leaving my cab outside went
into the bar where I had preciously me "Le Balafre." If I had doubted
that my movements were watched I must now have had such doubts
dispelled; for two minutes later the man with the scar came in and
greeted me affably!

I had learned something else. He did not know that I had recognized
him as the person who had tracked me to Dr. Stuart's house!

He invited me to drink with him, and I did so. As we raised our
glasses I made a move. Looking all about me suspiciously:

"Am I right in supposing that you have business in this part of
London?" I asked.

"Yes," he replied "My affairs bring me here sometimes."

"You are well acquainted with the neighbourhood?"

"Fairly well. But actually of course I am a stranger to London."

I tapped him confidentially upon the breast.

"Take my advice, as a friend," I said, "and visit these parts as
rarely as possible."

"Why do you say that?"

"It is dangerous. From the frien