This time Colwyn could not forbear smiling at the guileless way in which Superintendent Galloway had revealed the thoughts which had been passing through his mind. But his amusement was momentary, and it was in a grave, earnest tone that he replied:
"The hotel incident is a puzzling one, but I agree with you that it doesn't enter into the police case against Ronald. It is your duty to deal with the facts of the case, and if you think that Ronald committed this murder——"
"If I think that Ronald committed this murder!" Superintendent Galloway's interruption was both amazed and indignant. "I'm as certain he committed the murder as if I saw him do it with my own eyes. Did you, or anybody else, ever see a clearer case?"
"It is because the circumstantial evidence against him is so strong that I speak as I do," continued Colwyn, in the same earnest tones. "Innocent men have been hanged in England before now on circumstantial evidence. It is for that very reason that we should guard ourselves against the tendency to accept the circumstantial evidence against him as proof of his guilt, instead of examining all the facts with an open mind. We are the investigators of the circumstances: it is not for us to prejudge. That is the worst of circumstantial evidence: it tends to prejudgment, and sometimes to the ignoring of circumstances and facts which might tell in favour of the suspect, if they were examined with a more impartial eye. It is for these reasons that I am always careful to suspend judgment in cases of circumstantial evidence, and examine carefully even the smallest trifles which might tell in favour of the man to whom circumstantial evidence points.
"Have you discovered anything, since you have been at the inn, which shakes the theory that Ronald is the murderer?"
"I have come to the conclusion that the case is much more complex and puzzling than was at first supposed."
"I should like to know what makes you think that," returned Superintendent Galloway. "Up to the present I have seen nothing to shake my conviction that Ronald is the guilty man. What have you discovered that makes you think otherwise?"
"I do not go as far as that—yet. But I have come across certain things which, to my mind, need elucidation before it is possible to pronounce definitely on Ronald's guilt or innocence. To take them consecutively, let me repeat that I cannot reconcile Ronald's excitable conduct at the Durrington hotel with his supposed actions at the inn. In the former case he behaved like a man who, whether insane or merely excited, had not the slightest fear of the consequences. At this inn he acted like a crafty cautious scoundrel who had weighed the consequences of his acts beforehand, and took every possible precaution to save his own skin. You see nothing inconsistent in this——"
"I do not," interjected the superintendent firmly.
"Quite so. Then, the next point that perplexes me is why Ronald took the trouble to carry the body of his victim to the pit and throw it in."