“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 Wessex, 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, Wessex, 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, Wessex, tell me frankly, if in the whole course of your experience, you have ever met with a more perfect frame-up?” “What!” shouted Wessex, in sudden excitement. “What!” “I said a frame-up,” repeated Harley, quietly. “An American term, but one which will be familiar to you.” “Good God!” 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 damning facts. It’s a frame-up, Wessex! 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.”