She continued to look at me for a while, and then turned to Val Beverley.

"You don't think he did," she sobbed, "do you?"

She looked such a child, such a pretty, helpless child, as she knelt there on the carpet, that I felt a lump rising in my throat.

Val Beverley dropped down impulsively beside her and put her arms around the slender shoulders.

"Of course I don't," she exclaimed, indignantly. "Of course I don't.

It's quite unthinkable."

"I know it is," moaned the other, raising her tearful face. "I love him and know his great soul. But what do these others know, and they will never believe me."

"Have courage," I said. "It has never failed you yet. Mr. Paul Harley has promised to clear him by to-night."

"He has promised?" she whispered, still kneeling and clutching Val Beverley tightly. She looked up at me with hope reborn in her beautiful eyes. "He has promised? Oh, I thank him. May G.o.d bless him. I know he will succeed."

I turned aside, and walked out across the hall and into the empty study.

CHAPTER x.x.xII

PAUL HARLEY'S EXPERIMENT

I recognize that whosoever may have taken the trouble to follow my chronicle thus far will be little disposed to suffer any intrusion of my personal affairs at such a point. Therefore I shall pa.s.s lightly over the walk back to Cray's Folly, during which I contrived to learn much about Val Beverley's personal history but little to advance the investigation which I was there to a.s.sist.

As I had surmised, Miss Beverley had been amply provided for by her father, and was bound to Madame de Stamer by no other ties than those of friendship and esteem. Very reluctantly I released her, on our returning to the house; for she, perforce, hurried off to Madame's room, leaving me looking after her in a state of delightful bewilderment, the significance of which I could not disguise from myself. The absurd suspicions of Inspector Aylesbury were forgotten; so was the shadow upon the blind of Colonel Menendez's study. I only knew that love had come to me, an unbidden guest, to stay for ever.

Manoel informed me that a number of pressmen, not to be denied, had taken photographs of the Tudor garden and of the spot where Colonel Menendez had been found, but Pedro, following my instructions, had referred them all to Market Hilton.

I was standing in the doorway talking to the man when I heard the drone of Harley's motor in the avenue, and a moment later he and Wess.e.x stepped out in front of the porch and joined me. I thought that Wess.e.x looked stern and rather confused, but Harley was quite his old self, his keen eyes gleaming humorously, and an expression of geniality upon his tanned features.

"Hullo, Knox!" he cried, "any developments?"

"Yes," I said. "Suppose we go up to your room and talk."

"Good enough."

Inspector Wess.e.x nodded without speaking, and the three of us mounted the staircase and entered Paul Harley's room. Harley seated himself upon the bed and began to load his pipe, whilst Wess.e.x, who seemed very restless, stood staring out of the window. I sat down in the armchair, and:

"I have had an interesting interview with Mrs. Camber," I said.

"What?" exclaimed Harley. "Good. Tell us all about it."

Wess.e.x turned, hands clasped behind him, and listened in silence to an account which I gave of my visit to the Guest House. When I had finished:

"It seems to me," said the Inspector, slowly, "that the only doubtful point in the case against Camber is cleared up; namely, his motive."

"It certainly looks like it," agreed Harley. "But how strangely Mrs. Camber's story differs from that of Menendez although there are points of contact. I regret, however, that you were unable to settle the most important matter of all."

"You mean whether or not she had visited Cray's Folly?"

"Exactly."

"Then you still consider my theory to be correct?" I asked eagerly.

"Up to a point it has been proved to be," he returned. "I must congratulate you upon a piece of really brilliant reasoning, Knox. But respecting the most crucial moment of all, we are still without information, unfortunately. However, whilst the presence or otherwise, of Mrs. Camber in Cray's Folly on the night preceding the tragedy may prove to bear intimately upon the case, an experiment which I propose to make presently will give the matter an entirely different significance."

"Hm," said Wess.e.x, doubtfully, "I am looking forward to this experiment of yours, Mr. Harley, with great interest. To be perfectly honest, I have no more idea than the man in the moon how you hope to clear Camber."

"No," replied Harley, musingly, "the weight of evidence against him is crushing. But you are a man of great experience, Wess.e.x, in criminal investigations. Tell me honestly, have you ever known a murder case in which there was such conclusive material for the prosecution?"

"Never," replied the Inspector, promptly. "In this respect, as in others, the case is unique."

"You have seen Camber," continued Harley, "and have been enabled to form some sort of judgment respecting his character. You will admit that he is a clever man, brilliantly clever. Keep this fact in mind. Remember his studies, and he does not deny that they have included Voodoo. Remember his enquiries into the significance of Bat Wing. Remember, as we now learn definitely from Mrs. Camber's evidence, that he was in Cuba at the same time as the late Colonel Menendez, and once, at least, actually in the same hotel in the United States. Consider the rifle found under the floor of the hut; and, having weighed all these points judicially, Wess.e.x, tell me frankly, if in the whole course of your experience, you have ever met with a more perfect frame-up?"

"What!" shouted Wess.e.x, in sudden excitement. "What!"

"I said a frame-up," repeated Harley, quietly. "An American term, but one which will be familiar to you."

"Good G.o.d!" muttered the detective, "you have turned all my ideas upside down."

"What may be termed the physical evidence," continued Harley, "is complete, I admit: too complete. There lies the weak spot. But what I will call the psychological evidence points in a totally different direction. A man clever enough to have planned this crime, and Camber undoubtedly is such a man, could not-it is humanly impossible-have been fool enough, deliberately to lay such a train of d.a.m.ning facts. It's a frame-up, Wess.e.x! I had begun to suspect this even before I met Camber. Having met him, I knew that I was right. Then came an inspiration. I saw where there must be a flaw in the plan. It was geographically impossible that this could be otherwise."

"Geographically impossible?" I said, in a hushed voice, for Harley had truly astounded me.

"Geographical is the term, Knox. I admit that the discovery of the rifle beneath the floor of the hut appalled me."

"I could see that it did."

"It was the crowning piece of evidence, Knox, evidence of such fiendish cleverness on the part of those who had plotted Menendez's death that I began to wonder whether after all it would be possible to defeat them. I realized that Camber's life hung upon a hair. For the production of that rifle before a jury of twelve moderately stupid men and true could not fail to carry enormous weight. Whereas the delicate point upon which my counter case rested might be more difficult to demonstrate in court. To-night, however, we shall put it to the test, and there are means, no doubt, which will occur to me later, of making its significance evident to one not acquainted with the locality. The press photographs, which I understand have been taken, may possibly help us in this."

Bewildered by my friend's revolutionary ideas, which explained the hitherto mysterious nature of his enquiries, I scarcely knew what to say; but:

"If it's a frame-up, Mr. Harley," said Wess.e.x, "and the more I think about it the more it has that look to me, practically speaking, we have not yet started on the search for the murderer."

"We have not," replied Harley, grimly. "But I have a dawning idea of a method by which we shall be enabled to narrow down this enquiry."

It must be unnecessary for me to speak of the state of suppressed excitement in which we pa.s.sed the remainder of that afternoon and evening. Dr. Rolleston called again to see Madame de Stamer, and reported that she was quite calm. In fact, he almost echoed Val Beverley's words spoken earlier in the day.

"She is unnaturally calm, Mr. Knox," he said in confidence. "I understand that the dead man was a cousin, but I almost suspect that she was madly in love with him."

I nodded shortly, admiring his acute intelligence.

"I think you are right, doctor," I replied, "and if it is so, her amazing fort.i.tude is all the more admirable."

"Admirable?" he echoed. "As I said before, she has the courage of ten men."

A formal dinner was out of the question, of course; indeed, no one attempted to dress. Val Beverley excused herself, saying that she would dine in Madame's room, and Harley, Wess.e.x, and I, partook of wine and sandwiches in the library.

Inspector Aylesbury arrived about eight o'clock in a mood of repressed irritation. Pedro showed him in to where the three of us were seated, and:

"Good evening, gentlemen," said he, "here I am, as arranged, but as I am up to my eyes in work on the case, I will ask you, Mr. Harley, to carry out this experiment of yours as quickly as possible."