First, he went on, let me tell you of the arrangement of the Professors house. The whole of the ground and first floors are devoted to reception rooms. The remaining two floors and attics are bedrooms. Now, on the first floor, reached by passing through what is known as the Red Room, a small boudoir at the back, and then through a short passage, one comes to a large and spacious studio, an addition made by a former owner, a well-known artist. The only entrance is through the Red Room. The Professor rented the house on account of this studio, and had it fitted up as a laboratory. Here, secure from intrusion, he frequently carried on his experiments, making those remarkable discoveries which have rendered him world-famous. The laboratory is shut off from the boudoir by this short passage, there being two doors, one in the boudoir itself and one at the entrance to the Professors workshop. To both these doors are patent locks, of which the Professor keeps the keys, carrying them upon his watch-chain. No one else has a key, while the door from the conservatory over the porch is walled up. This is in order that no prying person shall enter in his absence and discover what experiments are in progress a very natural precaution.
Then they were secret experiments he was making? I remarked.
Yes. And now for the mysterious sequence of facts. They are as follows: Next morning, when the servants opened the house, one of the maids found, lying upon the hall table, a note addressed to Miss Greer. When Ethelwynn opened it, she found it to be from her father, telling her with regret that he must be absent abroad for several months, but that she was not to feel uncomfortable, and giving her certain directions, as well as how to obtain money during his enforced absence.
Well?
Joseph, the parrot, set up a loud screeching, trying to attract his masters attention.
Two hours later Antonio discovered upon the stairs leading up to the drawing-room a curious little gold and enamel charm in the form of a childs old-fashioned wooden doll a beautifully-made little thing, he went on; and half an hour later a maid, while cleaning the boudoir outside the locked door giving entrance to the laboratory, was surprised to find a small spot of blood upon the white goatskin mat. This seems to have aroused Antonios apprehensions. A telegram to the Professor at the North British Hotel in Edinburgh, sent by his daughter, brought, about three oclock in the afternoon, a reply stating that he was quite well, and it was not until seven oclock last evening that Ethelwynn communicated with me, her father having suggested this in the note she had received. I called upon her at once, and was shown the note, the little golden doll, and the ugly stain upon the mat. By then my curiosity became aroused. I went out to a telephone at a neighbouring public-house, and, unknown to anybody, got on to the reception clerk at the North British Hotel in Edinburgh. In answer to my inquiry, the young lady said that during the day a telegram had arrived addressed to Professor Greer, and it had been placed upon the board where telegrams were exhibited. Somebody had claimed it, but no one of the name was staying in the hotel.
You have now said that the Professor was your friend, I remarked. I understood you to say that he was an enemy.
Ill explain that later, said my companion impatiently, drawing hard at his pipe. Let me continue to describe the situation. Well, on hearing this from Edinburgh, I drove to Kings Cross, and, somewhat to my surprise, found that Professor Greer had left London by the train he had intended. The sleeping-car attendant who had travelled with him up North was just back, and he minutely described his passenger, referring to the fact that he refused to have an early cup of tea, because tea had been forbidden by his doctor.
A perplexing situation, I said. How did you account for the bloodstain? Had any of the servants met with an accident?
No, none. Neither dog, nor cat, nor any other pet was kept, therefore the stain upon the mat was unaccountable. It was that fact which caused me, greatly against Miss Ethelwynns consent, to seek a locksmith and take down the two locked doors of the laboratory.
And he paused, gazing once more straight into the flames, with a curious expression in those deep-set brown eyes.
And what did you find? I eagerly inquired.
I discovered the truth, he said in a hard, changed tone. The doors gave us a good deal of trouble. At the end of the laboratory, huddled in a corner, was the body of the Professor. He had been stabbed to the heart, while his face presented a horrible sight, the features having been burned almost beyond recognition by some terribly corrosive fluid a crime which in every phase showed itself to be due to some fiendish spirit of revenge.
But that is most extraordinary! I gasped, staring at the speaker. The sleeping-car conductor took him to Edinburgh! Besides, how could the two doors be locked behind the assassin? Were the keys still upon the victim?
They are still upon the dead mans watch-chain, he said. But, mark you, there is still a further feature of mystery in the affair. After her fathers departure for the station, his daughter put on a dressing-gown and, sending Morgan to bed, seated herself in her arm-chair before the fire in the Red Room, or boudoir, and took a novel. She read until past four oclock, being in the habit of reading at night, and then, not being sleepy, sat writing letters until a drowsiness fell upon her. She did not then awake until a maid entered at seven to draw up the blinds.
Then she was actually at the only entrance to the laboratory all the night!
Within a yard and a half of it, said Kershaw Kirk. But the affair presents many strange features, he went on. The worst feature of it all, Mr Holford, is that a motive a very strong motive is known to certain persons why I myself should desire to enter that laboratory. Therefore I must be suspected of the crime, and well, I admit at once to you I shall be unable to prove an alibi!
I was silent for a moment.
Unable to prove an alibi! I echoed. But the police have as yet no knowledge of the affair, I remarked.
No; I have, however, reported it in another quarter. Its a most serious matter, for I have suspicion that certain articles have been abstracted from the laboratory.
And that means what?
It means, my dear sir, very much more than you ever dream. This is at once the strangest and the most serious crime that has been committed in England for half a century. You are a man of action and of honour, Mr Holford. Will you become my friend, and assist me in trying to unravel it? he asked quickly, bending forward to me in his earnestness.
Most certainly I will, I replied, fascinated by the amazing story he had just related, quite regardless of the fact that he was the suspected assassin.
I wonder whether if I had known into what a vortex of dread, suspicion, and double-dealing that decision of mine would have led me I would have so lightly consented to render my help?
I think not.
Well, he said, glancing at his watch, the place has not been touched. If you consent to help me, it would be best that you saw it and formed your own independent theory. Would you care to come with me now? You could run along and make some excuse to Mrs Holford.
The remarkable mystery, surrounding as it did one of the best-known scientists in the land, had already gripped my senses. Therefore I did as he suggested, and about an hour later alighted from one of my own cars at the portico of that house of tragedy.