your bureau. She
had a key of her own. I have had an opportunity of examining yours, and
I do not find that slight discolouration which the scratch made upon the
varnish would have produced. You were not an accessory, therefore, and
she came, so far as I can read the evidence, without your knowledge to
rob you."

The Professor blew a cloud from his lips. "This is most interesting and
instructive," said he. "Have you no more to add? Surely, having traced
this lady so far, you can also say what has become of her."

"I will endeavour to do so. In the first place she was seized by your
secretary, and stabbed him in order to escape. This catastrophe I am
inclined to regard as an unhappy accident, for I am convinced that the
lady had no intention of inflicting so grievous an injury. An assassin
does not come unarmed. Horrified by what she had done she rushed wildly
away from the scene of the tragedy. Unfortunately for her she had lost
her glasses in the scuffle, and as she was extremely short-sighted she
was really helpless without them. She ran down a corridor, which she
imagined to be that by which she had come--both were lined with cocoanut
matting--and it was only when it was too late that she understood that
she had taken the wrong passage and that her retreat was cut off behind
her. What was she to do? She could not go back. She could not remain
where she was. She must go on. She went on. She mounted a stair, pushed
open a door, and found herself in your room."

The old man sat with his mouth open staring wildly at Holmes. Amazement
and fear were stamped upon his expressive features. Now, with an effort,
he shrugged his shoulders and burst into insincere laughter.

"All very fine, Mr. Holmes," said he. "But there is one little flaw
in your splendid theory. I was myself in my room, and I never left it
during the day."

"I am aware of that, Professor Coram."

"And you mean to say that I could lie upon that bed and not be aware
that a woman had entered my room?"

"I never said so. You WERE aware of it. You spoke with her. You
recognised her. You aided her to escape."

Again the Professor burst into high-keyed laughter. He had risen to his
feet and his eyes glowed like embers.

"You are mad!" he cried. "You are talking insanely. I helped her to
escape? Where is she now?"

"She is there," said Holmes, and he pointed to a high bookcase in the
corner of the room.

I saw the old man throw up his arms, a terrible c