Chief Inspector Mitchell was surprised by the story.
“It’s certainly puzzling,” he admitted. “If the document were genuine one could understand it a bit. It’s possible, though it’s not easy, to imagine circumstances under which it might have been written. It might, for example, be that Roper had proof of the doctor’s guilt, which he held back on getting the confession to enable him to extort continuous blackmail. Even in this case, however, it’s difficult to see why he couldn’t have blackmailed on the proof he already held. But none of these theories can be the truth because the document is not genuine. A forged confession is useless. Why then should Roper value it sufficiently to store it in a safe deposit? I confess it gets me, French, and I agree that you should go into it further. I don’t see that it will help you in any way with the Starvel affair, but you never know. Something useful for that too may come out. Say nothing to Philpot in the meantime, but get away to this place in Scotland and make a few inquiries.”
That night French took the 11.40 sleeping car express from King’s Cross. He changed at Edinburgh next morning and, having breakfasted, continued his journey into Fifeshire in a stopping train. Eleven o’clock saw him at Cupar, the headquarters of the Kintilloch district, and fifteen minutes later he was seated in the office of the superintendent, explaining to that astonished officer the surprising development which had taken place.
“They told me from Headquarters that you were not satisfied about the affair when it occurred,” French concluded. “I wondered if you would tell me why?”
“I will surely,” the other returned, leaning forward confidentially, “but you’ll understand that we hadn’t what you’d call an actual suspicion. There was, first of all, the fact that it wasn’t a very common kind of accident. I’ve heard of an occasional person falling downstairs, but I’ve never heard of any one being killed by it. Then there was nobody there when it happened except Philpot: there was no one to check his statement. What’s more, he knew the servant was going out. The girl’s statement was that Mrs. Philpot was with the doctor in the study when she asked permission to go. It all looked possible, you understand. But the thing that really started us wondering was that the Philpots were supposed to be on bad terms, and it was whispered that Philpot was seeing a good deal of one of the nurses up at the Institute. It’s only fair to say that we couldn’t prove either of these rumors. The only definite things we got hold of were that the Philpots never went anywhere together, Mrs. Philpot being socially inclined and he not, and that he and the nurse were seen one day lunching in a small hotel in Edinburgh. But of course there was nothing really suspicious in these things and the rest may have been just gossip. In any case he didn’t marry the nurse. The talk made us look into the affair, but we thought it was all right and we let it drop.”
French nodded. The superintendent’s statement was comprehensive and he did not at first see what more there was to be learned. But he sat on, turning the thing over in his mind, in his competent, unhurried way, until he had thought out and put in order a number of points upon which further information might be available.
“I suppose that other doctor—Ferguson, you called him—was quite satisfied by the accident theory?”
“Sergeant MacGregor asked him that, as a routine question. Yes, there was no doubt the blow on the temple killed her and in his opinion she might have received it by falling down the stairs.”
“And the servant girl had no suspicion?”
“Well, we didn’t exactly ask her that in so many words. But I’m satisfied she hadn’t. Besides, her story was all right. There was nothing to cause her suspicion—if she was telling the truth.”