“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.