"Not here, sir."

"But he slept here last night," I remarked. "I have an appointment with him."

The man consulted the big book before him, and answered:

"Captain Durnford went out at 9:27 last night, sir, but has not returned."

Strange, I thought, but although I waited in the club nearly an hour, he did not put in an appearance. I called again at noon, and he had not come in, and again at two o'clock, but he had not even then made his appearance. Then I began to be anxious. I returned to the hotel, resolved to wait for a few hours longer. He might have altered his mind and gone to Eastbourne in search of Muriel; yet, had he done so, he would surely have telegraphed to me.

About four o'clock, as I was pa.s.sing through the big hall of the hotel, I heard a voice behind me utter a greeting in Italian, and turning in surprise, found Olinto, dressed in his best suit of black, standing hat in hand.

In an instant I recollected what Jack had told me, and regarded him with some suspicion.

"Signor Commendatore," he said in a low voice, as though fearing to be overheard, "may I be permitted to speak in private with you?"

"Certainly," I said, and I took him in the lift up to my room.

"I have come to warn you, signore," he said, when I had given him a seat. "Your enemies mean harm to you."

"And who are they, pray?" I asked, biting my lips. "The same, I suppose, who prepared that ingenious trap in Lambeth?"

"I am not here to reveal to you who they are, signore, only to warn you to have a care of yourself," was the Italian's reply.

"Look here, Olinto!" I exclaimed determinedly, "I've had enough of this confounded mystery. Tell me the truth regarding the a.s.sa.s.sination of your poor wife up in Scotland."

"Ah, signore!" he answered sadly in a changed voice, "I do not know. It was a plot. Someone represented me--but he was killed also. They believed they had struck me down," he added, with a bitter laugh. "Poor Armida's body was found concealed behind a rock on the opposite side of the wood. I saw it--ah!" he cried shuddering.

"Then you are ignorant of the ident.i.ty of your wife's a.s.sa.s.sin?"

"Entirely."

"Tell me one thing," I said. "Did Armida possess any trinket in the form of a little enameled cross--like a miniature cross of cavaliere?"

"Yes; I gave it to her. I found it on the floor at the Mansion House, where I was engaged as odd waiter for a banquet. I know I ought to have given it up to the Lord Mayor's servants, but it was such a pretty little thing that I was tempted to keep it. It probably had fallen from the coat of one of the diplomatists dining there."

I was silent. The faint suspicion that Oberg had been at that spot was now entirely removed. The only clue I had was satisfactorily accounted for.

"Why do you ask, Signor Commendatore?" he added.

"Because the cross was found at the spot, and was believed to have been dropped by the a.s.sa.s.sin," I said.

The police had, it seemed, succeeded in discovering the unfortunate woman after all, and had found that she was his wife.

"You know a man named Leithcourt?" I asked a few moments later. "Now, tell the truth. In this affair, Olinto, our interests are mutual, are they not?"

He nodded, after a moment's hesitation.

"And you know also a man named Archer--who is sometimes known as Hornby, or Woodroffe--as well as a friend of his called Chater."

"Si, signore," he said. "I have met them all--to my regret."

"And have you ever met a Russian--a certain Baron Oberg--and his niece, Elma Heath?"

"His niece? She isn't his niece."

"Then who is she?" I demanded.

"How do I know? I have seen her once or twice. But she's dead, isn't she? She knew the secret of those men, and they intended to kill her. I tried to prevent them taking her away on the yacht, and I would have gone to the police--only I dare not."

"Why?"

"Well, because my own hands were not quite clean," he answered after a pause, his eyes fixed upon mine the while. "I knew they intended to silence her, but I was powerless to save her, poor young lady. They took her on board Leithcourt's yacht, the _Iris_, and they sailed for the Mediterranean, I believe."

"Then the name and appearance of the yacht was altered on the voyage, and it became the _Lola_," I said.

"No doubt," he smiled. "The _Iris_ was a steamer of many names, and had, I believe, been painted nearly all the colors of the rainbow at various times. It was a mysterious vessel, but she exists no more. They scuttled her somewhere up in the Baltic, I've heard."

"And who is this Oberg?" I inquired, urging him to reveal to me all he knew concerning him.

"He stands in great fear of the poor young lady, I believe, for it was at his instigation that Leithcourt and his friends took her on that fatal yachting cruise."

"And what was your connection with them?"

"Well, I was Leithcourt's servant," was his reply. "I was steward on the _Iris_ for a year, until I suppose they thought that I began to see too much, and then I was placed in a position ash.o.r.e."

"And what did you see?"

"More than I care to tell, signore. If they were arrested I should be arrested, too, you see."

"But I mean to solve this mystery, Olinto," I said fiercely, for I was in no trifling mood. "I'll fathom it if it costs me my life."

"If the signore solves it himself, then I cannot be charged with revealing the truth," was the man's diplomatic reply. "But I fear that they are far too wary."

"Armida has lost her life. Surely that is sufficient incentive for you to bring them all to justice?"

"Of course. But if the law falls upon them, it will also fall upon me."

I explained the terrible affliction to which my love had been subjected by those heartless brutes, whereupon he cried enthusiastically:

"Then she is not dead! She can tell us everything!"

"But cannot you tell us?"

"No; not all. The secret she knows has never been revealed. They feared she might be incautious, and for that reason Oberg made the villainous suggestion of the yachting trip. She was to be drowned--accidentally, of course."

"She is in St. Petersburg now. I left her a week ago."

"In Russia! Ah, signore, for her sake, don't allow the young lady to remain there. The Baron is all-powerful. He does what he wishes in Russia, and the more merciless he is to the people he governs, the greater rewards he receives from the Czar. I have never been in Russia, but surely it must be a strange country, signore!"