Edward Grierson

And now comes the remarkable part of the story.

Oh?

Yes, Dr. Watsons.

From that time on, a curious change came over the professor.

Those around him had the inexplicable feeling that he was under some influence that darkened his better nature.

No, on the contrary.

His lectures were more brilliant than ever.

His mind was singularly alert.

But there was something new about him, something sinister.

His daughter tried again and again to penetrate the mask he'd put on, but in vain.

He behaved to her almost as though she were a stranger.

In fact, all of his friends and co-workers noticed a rather singular change of personality.

And the incident of the letters, Mr. Bennett.

Don't forget that.

I was just coming to that.

You see, Dr. Watson, the professor has never had any secrets from me.

I handled every paper which came in to him and opened all his letters.

Yes, yes, of course, of course.

Shortly after his return, all of this was changed.

Certain letters began to arrive marked with an X under the stamp...