5 : Inspector OatesInspector Oates, sitting in the library at Little Venice, a pad of scribbling paper in front of him, bore a gloomy expression upon his cold, rather weary face. He had spent a trying three hours. There may be Scotland Yard detectives who enjoy wringing secrets from unwilling witnesses and placing their fingers unerringly upon the most likely suspect late on a Sunday evening, but Stanislaus Oates was not among them. He had found the whole business very tedious, very distressing, and probably auguring a lot of trouble. His last witness was now on his way from the drawing room, where the family had assembled, and Mr. Oates was quite anxious to see him, so that when the door opened and a uniformed constable put his head in to say that Mr. Campion was outside he pushed the pa