But what under the sun did the document mean? Was it really a statement of fact, a genuine confession of murder, written by Philpot? If so, how had it fallen into the hands of Roper, and what had the man been keeping it for? Had he been blackmailing Philpot? Or was the whole thing a forgery? French was completely puzzled.

But it was evident that the matter could not be left where it stood. It must be gone into and its monstrous suggestion must be proved or rebutted.

French’s hand stole toward his pocket and half unconsciously he filled and lit his pipe, puffing out clouds of blue smoke while he thought over this latest development. If the confession were genuine and if Roper were blackmailing Philpot, Philpot would want to get rid of Roper. Could it therefore be possible that Philpot was in some way mixed up with the Starvel crime? Not personally of course; there was medical evidence that the doctor was ill in bed at the time of the tragedy. But could he be involved in some way that French could not at the moment fathom? It seemed too far-fetched to consider seriously, and yet here was undoubtedly a connection with Roper of the most extraordinary kind.

But this was sheer idiocy! French pulled himself together. An inspector of his service ought to know better than to jump to conclusions! Hadn’t bitter experience again and again taught him its folly? Let him get hold of his data first.

And then French recalled the statement of the landlord of the Thirsdale Arms in Thirsby. He had taken all that the landlord had said with a grain of salt—gossips were seldom entirely reliable—but if Philpot had been gambling to the extent of embarrassing himself financially. . . . It was worth looking into anyway.

Obviously the first thing was to make sure that the Philpot of the confession really was the Thirsby doctor. This at least was easy. He sent for a medical directory and traced the Thirsby man’s career. A few seconds gave him his information.

Herbert Philpot was born in 1887, making him now 39 years old. He passed through Edinburgh University, taking his final in 1909. For a year he was at sea and for two more years he worked in one of the Edinburgh hospitals. In 1913 he was appointed junior assistant at the Ransome Institution at Kintilloch, where he remained for eight years. In September 1921—four months after the date of the confession, French noted—he set up for himself in Thirsby.

So that was that. French’s interest grew as he considered the matter. If the confession were genuine, the affair would be something in the nature of a scoop, not only for himself personally, but even for the great organisation of the Yard. It would create a first-class sensation. The powers that be would be pleased and certain kudos and possible promotion would be forthcoming.

French left the Yard and drove to the office of The Scotsman in Fleet Street. There he asked to see the files of the paper for the year 1921, and turning to the month of May, he began a search for news of an accident to a Mrs. Philpot at Kintilloch.

He found it sooner than he had expected. On the 17th May, two days after the date of the confession, there was a short paragraph headed “Tragic Death of a Doctor’s Wife.” It read:—