round the room, as though in search of something.
Then we heard the deep strong voice of the Detective:
"So far as I can see, the object was to bring that key to the lock of the safe. There seems to be some secret in the mechanism that I am unable to guess at, though I served a year in Chubb's before I joined the police. It is a combination lock of seven letters; but there seems to be a way of locking even the combination. It is one of Chatwood's; I shall call at their place and find out something about it." Then turning to the Doctor, as though his own work were for the present done, he said:
"Have you anything you can tell me at once, Doctor, which will not interfere with your full report? If there is any doubt I can wait, but the sooner I know something definite the better." Doctor Winchester answered at once:
"For my own part I see no reason in waiting. I shall make a full report of course. But in the meantime I shall tell you all I know--which is after all not very much, and all I think--which is less definite. There is no wound on the head which could account for the state of stupor in which the patient continues. I must, therefore, take it that either he has been drugged or is under some hypnotic influence. So far as I can judge, he has not been drugged--at least by means of any drug of whose qualities I am aware. Of course, there is ordinarily in this room so much of a mummy smell that it is difficult to be certain about anything having a delicate aroma. I dare say that you have noticed the peculiar Egyptians scents, bitumen, nard, aromatic gums and spices, and so forth. It is quite possible that somewhere in this room, amongst the curios and hidden by stronger scents, is some substance or liquid which may have the effect we see. It is possible that the patient has taken some drug, and that he may in some sleeping phase have injured himself. I do not think this is likely; and circumstances, other than those which I have myself been investigating, may prove that this surmise is not correct. But in the meantime it is possible; and must, till it be disproved, be kept within our purview." Here Sergeant Daw interrupted:
"That may be, but if so, we should be able to find the instrument with which the wrist was injured. There would be marks of blood somewhere."
"Exactly so!" said the Doctor, fixing his glasses as though preparing for an argument. "But if it be that the patient has used some strange drug, it may be one that does not take effect at once. As we are as yet ignorant of its potentialities--if, indeed, the whole surmise is correct at all--we must be prepared at all points."
Here Miss Trelawny joined in the conversation:
"That would be quite right, so far as the action of the drug was concerned; but according to the second part of your surmise the wound may have been self-inflicted, and this after the drug had taken effect."
"True!" said the Detective and the Doctor simultaneously. She went on:
"As however, Doctor, your guess does not exhaust the possibilities, we must bear in mind that some other variant of the same root-idea may be correct. I take it, therefore, that our first search, to be made on this assumption, must be for the weapon with which the injury was done to my Father's wrist."
"Perhaps he put the weapon in the safe before he became quite unconscious," said I, giving voice foolishly to a half-formed thought.
"That could not be," said the Doctor quickly. "At least I think it could hardly be," he added cautiously, with a brief bow to me. "You see, the left hand is covered with blood; but there is no blood mark whatever on the safe."
"Quite right!" I said, and there was a long pause.
The first to break the silence was the Doctor.
"We shall want a nurse here as soon as possible; and I know the very one to suit. I shall go at once to get her if I can. I must ask that till I return some of you will remain constantly with the patient. It may be necessary to remove him to another room later on; but in the meantime he is best left here. Miss Trelawny, may I take it that either you or Mrs. Grant will remain her--not merely in the room, but close to the patient and watchful of him--till I return?"
She bowed in reply, and took a seat beside the sofa. The Doctor gave her some directions as to what she should do in case her father should become conscious before his return.
The next to move was Superintendent Dolan, who came close to Sergeant Daw as he said:
"I had better return now to the station--unless, of course, you should wish me to remain for a while."
He answered, "Is Johnny Wright still in your division?"
"Yes! Would you like him to be with you?" The other nodded reply. "Then I will send him on to you as soon as can be arranged. He shall then stay with you as long as you wish. I will tell him that he is to take his instructions entirely from you."
The Sergeant accompanied him to the door, saying as he went:
"Thank you, sir; you are always thoughtful for men who are working with you. It is a pleasure to me to be with you again. I shall go back to Scotland Yard and report to my chief. Then I shall call at Chatwood's; and I shall return here as soon as possible. I suppose I may take it, miss, that I may put up here for a day or two, if required. It may be some help, or possibly some comfort to you, if I am about, until we unravel this mystery."
"I shall be very grateful to you." He looked keenly at her for a few seconds before he spoke again.
"Before I go have I permission to look about your Father's table and desk? There might be something which would give us a clue--or a lead at all events." Her answer was so unequivocal as almost to surprise him.
"You have the fullest possible permission to do anything which may help us in this dreadful trouble--to discover what it is that is wrong with my Father, or which may shield him in the future!"
He began at once a systematic search of the dressing-table, and after that of the writing-table in the room. In one of the drawers he found a letter sealed; this he brought at once across the room and handed to Miss Trelawny.
"A letter--directed to me--and in my Father's hand!" she said as she eagerly opened it. I watched her face as she began to read; but seeing at once that Sergeant Daw kept his keen eyes on her face, unflinchingly watching every flitting expression, I kept my eyes henceforth fixed on his. When Miss Trelawny had read her letter through, I had in my mind a conviction, which, however, I kept locked in my own heart. Amongst the suspicions in the mind of the Detective was one, rather perhaps potential than definite, of Miss Trelawny herself.
For several minutes Miss Trelawny held the letter in her hand with her eyes downcast, thinking. Then she read it carefully again; this time the varying expressions were intensified, and I thought I could easily follow them. When she had finished the second reading, she paused again. Then, though with some reluctance, she handed the letter to the Detective. He read it eagerly but with unchanging face; read it a second time, and then handed it back with a bow. She paused a little again, and then handed it to me. As she did so she raised her eyes to mine for a single moment appealingly; a swift blush spread over her pale cheeks and forehead.
With mingled feelings I took it, but, all said, I was glad. She did not show any perturbation in giving the letter to the Detective--she might not have shown any to anyone else. But to me. . .I feared to follow the thought further; but read on, conscious that the eyes of both Miss Trelawny and the Detective were fixed on me.
"MY DEAR DAUGHTER, I want you to take this letter as an instruction-- absolute and imperative, and admitting of no deviation whatever--in case anything untoward or unexpected by you or by others should happen to me. If I should be suddenly and mysteriously
