"Flight!" I gasped. "What, have they gone?"

"Listen, and I'll tell you. The servants have described the whole affair down in the village, so there's no doubt about it. Leithcourt showed Muriel the telegram and urged her to fly. At first she refused, but for her father's sake was induced to prepare to accompany him. Of course, the guests were in ignorance of all this. The brougham was ordered to be ready in the stable-yard and not to go round, while Mrs. Leithcourt's maid tried to bring the lady back to her senses. Leithcourt himself, it seemed, rushed hither and thither, seizing the jewel-cases of his wife and daughter and whatever valuables he could place his hand upon, while the mother and daughter were putting on their things. As he rushed down the main staircase to the library, where his check-book and some ready cash were locked in the safe, he met a stranger who had just been admitted and shown into the room. Leithcourt closed the door and faced him. What afterwards transpired, however, is a mystery, for two hours later, after he and the two women had escaped, leaving the house-party to their own diversions, the stranger was found locked in a large cupboard and insensible. The sensation was a tremendous one. Cowan, the doctor, was called, and declared that the stranger had been drugged and was suffering from some narcotic. The servant who admitted him declared that the man had said he had an appointment with his master, and that no card was necessary. He, however, gave the name of Chater."

"Chater!" I cried, starting up. "Are you certain of that name?"

"I only know what Cowan told me," was my uncle's reply. "But do you know him?"

"Not at all. Only I've heard that name before," I said. "I knew a man out in Italy of the same name. But where is the visitor now?"

"In the hospital at Dumfries. They took him there in preference to leaving him alone at Rannoch."

"Alone?"

"Of course. Everyone has left, now the host and hostess have slipped off without saying good-bye. Scandalous affair, isn't it? But, my boy, you'll remember that I always said I didn't like those people. There's something mysterious about them, I feel certain. That telegram gave them warning of the visit of the man Chater, depend upon it, and for some reason they're afraid of him. It would be interesting to know what transpired between the two men in the library. And these are people who've been taken up by everybody--mere adventurers, I should call them!" And old Sir George sniffed again at thought of such scandal happening in the neighborhood. "If Gilrae must let Rannoch, then why in the name of Fortune doesn't he let it to respectable folk and not to the first fellow who answers his advertis.e.m.e.nt in _The Field?_ It's simply disgraceful!"

"Certainly, it is a most extraordinary story," I declared. "Leithcourt evidently wished to escape from his visitor, and that's why he drugged him."

"Why he poisoned him, you mean. Cowan says the fellow is poisoned, but that he'll probably recover. He is already conscious, I hear."

I resolved to call on the doctor, who happened to be well known to me, and obtain further particulars. Therefore at eleven o'clock I drove into Dumfries and entered his consulting-room.

He was a spare, short, fair man, a trifle bald, and when I was shown in he welcomed me warmly, speaking with his p.r.o.nounced Galloway accent.

"Well, it is a very mysterious case, Mr. Gregg," he said, after I had told him the object of my visit. "The gentleman is still in the hospital, and I have to keep him very quiet. He was poisoned without a doubt, and has had a very narrow escape of his life. The police got wind of the affair, and Mackenzie called to question him. But he refused to make any statement whatever, apparently treating the affair very lightly. The police, however, are mystified as to the reason of Mr.

Leithcourt's sudden flight, and are anxious to get at the bottom of the curious affair."

"Naturally. And more especially after the tragedy up in Rannoch Wood a short time ago," I said.

"That's just it," said the doctor, removing his pince-nez and rubbing them. "Mackenzie seems to suspect some connection between Leithcourt's sudden disappearance and that mysterious affair. It seems very evident that the telegram was a warning to Leithcourt of the man Chater's intention of calling, and that the last-named was shown in just at the moment when the fugitive was on the point of leaving."

"Chater." I echoed. "Do you know his Christian name?"

"Hylton Chater. He is apparently a gentleman. Curious that he will tell us nothing of the reason he called, and of the scene that occurred between them."

Knowing all that I did, I was not surprised. Leithcourt had undoubtedly taken him unawares, but knights of industry never betray each other.

My next visit was to Mackenzie, for whom I had to wait nearly an hour, as he was absent in another quarter of the town.

"Ah, Mr. Gregg!" he cried gladly, as he came in to find me seated in a chair patiently reading the newspaper. "You are the very person I wish to see. Have you heard of this strange affair at Rannoch?"

"I have," was my answer. "Has the man in the hospital made any statement yet?"

"None. He refuses point-blank," answered the detective. "But my own idea is that the affair has a very close connection with the two mysteries of the wood."

"The first mystery--that of the man--proves to be a double mystery," I said.

"How? Explain it."

"Well, the waiter Olinto Santini is alive and well in London."

"What!" he gasped, starting up. "Then he is not the person you identified him to be?"

"No. But he was masquerading as Santini--made up to resemble him, I mean, even to the mole upon his face."

"But you identified him positively?"

"When a person is dead it is very easy to mistake countenances. Death alters the countenance so very much."

"That's true," he said reflectively. "But if the man we've buried is not the Italian, then the mystery is considerably increased. Why was the real man's wife here?"

"And where has her body been concealed? That's the question."

"Again a mystery. We have made a thorough search for four days, without discovering any trace of it. Quite confidentially, I'm wondering if this man Chater knows anything. It is curious, to say the least, that the Leithcourts should have fled so hurriedly on this man's appearance. But have you actually seen Olinto Santini?"

"Yes, and have spoken with him."

"I sent up to London asking that inquiries should be made at the restaurant in Bayswater, but up to the present I have received no report."

"I have chatted with Olinto. His wife has mysteriously disappeared, but he is in ignorance that she is dead."

"You did not tell him anything?"

"Nothing."

"Ah, you did well. There is widespread conspiracy here, depend upon it, Mr. Gregg. It will be an interesting case when we get to the bottom of it all. I only wish this fellow Chater would tell us the reason he called upon Leithcourt."

"What does he say?"

"Merely that he has no wish to prosecute, and that he has no statement to make."

"Can't you compel him to say something?" I asked.

"No, I can't. That's the infernal difficulty of it. If he don't choose to speak, then we must still remain in ignorance, although I feel confident that he knows something of the strange affair up in the wood."

And although I was silent, I shared the Scotch detective's belief.

The afternoon was chill and wet as I climbed the hill to Greenlaw.

The sudden disappearance of the tenants of Rannoch was, I found, on everyone's tongue in Dumfries. In the smoke-room of the railway hotel three men were discussing it with many grimaces and sinister hints, and the talkative young woman behind the bar asked me my opinion of the strange goings-on up at the Castle.

As I walked on alone, with the dark line of woods crowning the hill-top before me, the scene of that double tragedy, I again calmly reviewed the situation. I longed to go to the hospital and see Hylton Chater, yet when I recollected the part he had played with Hornby on board the _Lola_, I naturally hesitated. He was allied with Hornby, apparently against Leithcourt, although the latter was Hornby's friend.

What, I wondered, had transpired in the library of that gray old castle which stood out boldly before me, dark and grim, as I plodded on through the rain? How had Leithcourt succeeded in rendering his enemy insensible and hiding him in that cupboard? Did he believe that he had killed him?

If I went boldly to Chater, then it would only be the betrayal of myself. No. I decided that the man who had smoked and chatted with me so affably on that hot, breathless night in the Mediterranean must remain in ignorance of my presence, or of my knowledge. Therefore I stayed for a week at Greenlaw with eyes and ears ever open, yet exercising care that the patient in the hospital should be unaware of my presence.

Mackenzie saw him on several occasions, but he still persisted in that tantalizing silence. The inquiry into the death of the unidentified man in Rannoch Wood had been resumed, and a verdict returned of willful murder against some person unknown, while of the second crime the public had no knowledge, for the body was not discovered.