radio waves are transmitted.
In other words, mental telegraphy is at present merely a mild form of
hypnotism. Until it has been developed so that those hypnotic powers can
be directed through space, and directed accurately to those individuals
to whom they are intended, this science will have no significance. It
remains for scientists of to-day to bring about that development."

I closed the book. When I looked up, Drake was watching me intently, as
if expecting me to say something.

"Drake," I said slowly, more to myself than to him, "the pinwheel is
beginning to unravel. We have found the beginning thread. Perhaps, if we
follow that thread...."

Drake smiled.

"If you'll pick up your hat and coat, Dale," he interrupted, "I think we
have an appointment. This Michael Strange, whose book you have just
enjoyed so immensely, is now residing on a certain quiet little side
street about three miles from the square, in London!"

* * * * *

I followed Drake in silence, until we had left Cheney Lane in the gloom
behind us. At the entrance to the square my companion called a cab; and
from there on we rode slowly, through a heavy darkness which was
blanketed by a wet, penetrating fog. The cabby, evidently one who knew
my companion by sight (and what London cabby does not know his Scotland
Yard men!) chose a route that twisted through gloomy, uninhabited side
streets, seldom winding into the main route of traffic.

As for Drake, he sank back in the uncomfortable seat and made no attempt
at conversation. For the entire first part of our journey he said
nothing. Not until we had reached a black, unlighted section of the city
did he turn to me.

"Dale," he said at length, "have you ever hunted tiger?"

I looked at him and laughed.

"Why?" I replied. "Do you expect this hunt of ours will be something of
a blind chase?"

"It will be a blind chase, no doubt of it," he said. "And when we have
followed the trail to its end, I imagine we shall find something very
like a tiger to deal with. I have looked rather deeply into Michael
Strange's life, and unearthed a bit of the man's character. He has twice
been accused of murder--murder by hypnotism--and has twice cleared
himself by throwing scientific explanations at the police. That is the
nature of his entire history for the past ten years."

* * * * *

I nodded, without replying. As Drake turned away from me again