A short story in the style of Father Brown by Gilbert Keith Chesterton. Excerpt: It was natural, of course, that we should think of calling in expert opinion on the tragedy; or, at least, something subtler than the passing policeman. But I could think of few people or none whom it would be useful to consult thus privately. I remembered an investigator who had taken some interest in Southby's original trouble; merely because I remembered the curious surname of Shrike; but report told me that he had since grown rich and retired, and was now yachting inaccessibly among the Pacific Islands.My old friend Brown, the Roman priest at Cobhole, who had often given me good advice in small problems, had wired that he feared he could not come down, even for an hour. He merely added-what, I confess, I thought inconsequent-that the key might be found in the sentence, that "Mester was the cheeriest soul possible."Superintendent Matthews still carries weight with any considering person who has actually talked to him; but he is naturally in most cases officially reticent, and in some cases officially slow.Sir Borrow seemed stricken rigid by this final tragedy; a thing pardonable enough in a very old man who, whatever his faults, had never had anything but tragedy upon tragedy out of his own blood and name.Wellman can be trusted with anything up to the Crown jewels; but not with an idea. Harriet is far too good a woman to be a good detective. So I was left with my unsatisfied appetite for expert advice. I think the others shared it to some extent; I think we wished a man different from all of us would walk into the room, a man of the world outside us, a man of wider experience, a man of experience so wide-if it were possible-that he should know even one case that was like our own. Certainly none of us had the wildest suspicion of who the man would be.I have explained that when poor Evelyn's body was found it was clad in a dressing-gown, as if she had been suddenly summoned from her room, and the door of the Priest's Room stood open. Acting on I know not what impulse, I had closed it to; and, so far as I know, it was not opened again till it was opened from within. I confess that for me that opening was terrible.Sir Borrow, Wellman, and I were alone in the chamber of slaughter. At least we were alone till a total stranger strolled into the room, without even pulling the peaked cap off his head. He was a sturdy man, stained with travel, especially as regards his leggings, which were loaded with clay and slime of innumerable ditches. But he was entirely unconcerned, which is more than I was. For, despite his extra dirt and his extra impudence, I recognised him as the fugitive convict, Mester, whose letter I had so foolishly passed on to his fellow convict. He entered the room with his hands in his pockets, and whistling. Then the whistling ceased, and he said: "You seem to have shut the door again. I suppose you know it's not easy to open again on this side