“It would be so interesting that I feel impelled to take steps to discover the facts,” he said. “After lunch I shall visit the record department of Scotland Yard. While I am away, you can complete the filing of those papers I gave you yesterday, relating to the work which we have just completed.” Harold received these instructions without any great enthusiasm. He was not greatly interested in the case of this Dr. Morlandson, since it had occurred so many years ago and could have no possible bearing upon any problem of the present day. In his recollection of this forgotten trial the Professor seemed to be neglecting entirely the problems presented by the murders in Praed Street. Perhaps he had decided that they were not worthy of his notice. It was not every problem submitted to him which appealed to him sufficiently to induce him to devote his energies to its solution. He spent the afternoon in the study, working half-heartedly and awaiting the Professor’s return. But it was not until nearly dinner-time that his employer came in, and then he could see by his expression that the result of his search had in some way disappointed him. Dinner was passed in almost complete silence, and the two returned once more to the study. “I have discovered the subsequent history of Dr. Morlandson,” announced the Professor abruptly, as soon as he had finished his coffee. “I will recount to you the result of my researches at Scotland Yard. You can make notes of them, and file them with your précis of his trial.” Harold produced pencil and paper, and the Professor proceeded to give an account of how he had spent the afternoon. After some delay the authorities at Scotland Yard, who were always anxious to carry out any of Dr. Priestley’s requests, even though they were ignorant of the motive behind them, had found the record of Morlandson’s career after his sentence. He had been sent to Dartmoor, and had served his time there. He had been released on licence in 1920, having undergone fourteen years of his sentence. He had then remained for a short time in London, arranging his affairs, but had not communicated with anybody but his solicitor, to whom he had expressed his intention of spending the rest of his life in the most complete seclusion, and devoting himself to chemical research, for which he had always had a bent during the period in which he was in practice. Before the catastrophe which had overtaken him, Morlandson had been a tall, spare man, clean-shaven, and with carefully brushed dark hair. Upon his release he had developed a slight stoop, and although he was still clean-shaven and smart in his appearance, his hair had gone nearly white. He told his solicitor that he knew he had only a few years longer to live, but that he hoped that during that period his researches would confer some benefit upon suffering humanity. He proposed to commence them as soon as he could find a suitable spot for the purpose, where he could live entirely alone.