‘That’s all right. Would it be indiscreet to ask the reason of these queries?’
‘Not at all, sir, but I fear I am not at liberty to give you much information. The man with the pointed beard is suspected of having decoyed a French lady over to England and murdered her. But, you will understand, it is so far only a matter of suspicion.’
‘Well, I should be interested to hear how it turns out.’
‘I am afraid you will hear, sir. If this man is tried, I expect your evidence will be required.’
‘Then for both our sakes I hope your case will not go on. Good-day, Mr. Burnley. Glad to have met you.’
There being nothing to keep him in Glasgow, the Inspector returned to the Central and took the midday London express. As it thundered southwards across the smiling country, he thought over the interview he had just had. He could not help marvelling again at the luck that had pursued his efforts ever since the inquiry began. Nearly every one he had interviewed had known at least something, if not always exactly what he wanted. He thought how many thousands of persons crossed the Channel each week whose journey it would be absolutely impossible to trace, and here, in the one instance that mattered, he had found a man who had been able to give him the very information he needed. Had Felix not gone in the bus, had Mr. Gordon not been so observant, had the circumstances not fallen out precisely as they did, he might never have ascertained the knowledge of Felix’s movements that day. And the same applied all through. Truly, if he did not get a complete case it would be his own fault.
And yet the evidence was unsatisfactory. It was never conclusive. It had a kind of thus-far-and-no-farther quality which always pointed to a certain thing, but stopped short of certainty. Here there was a strong presumption that Mme. Boirac had crossed with Felix, but no proof. It might, however unlikely, have been some one else. Nearly all the evidence he had got was circumstantial, and he wanted certainty.
His mind switched over to the case itself. He felt the probability of Felix’s guilt had been somewhat strengthened. Mr. Gordon’s statement was entirely consistent with that hypothesis. One would naturally expect the journey to be carried out just as it had been. In Paris, the lovers would be careful not to be seen together. At a station like the Gare du Nord, where acquaintances of both might easily be present, they would doubtless ignore each other’s existence. On the boat they would probably risk a conversation, particularly as the deck was almost deserted owing to the weather, but in London, especially if Felix expected some one to meet him, they would follow their Paris plan and leave the station separately. Yes, it certainly worked in.
The Inspector lit one of his strong cigars and gazed with unseeing eyes at the flying landscape as he continued his ruminations. On arrival in London what would be their next step? Felix, he expected, would shake off his friend, meet Madame at some prearranged spot, and in all probability take her to St. Malo. Then he recalled that the housekeeper had been granted a holiday, and they would doubtless arrive to find a house without food or fire, empty and cheerless. Therefore would they not go to an hotel? He thought it likely, and he began to plan a possible future step, a visit to all the probable hotels. But while speculating on the best to begin with, it occurred to him that if Felix had really committed the murder, it must, almost certainly, have been done at St. Malo. He could not conceive it possible at a hotel. Therefore probably they did go to the villa after all.
He went a step further. If the murder had taken place at St. Malo, the cask must have been packed there. He recalled the traces this operation had left in Boirac’s study. Surely some similar indications must have been left at the villa? If the cask had stood on a carpet or even possibly a linoleum, he might expect marks of the ring. And if not, there was the sawdust. He did not believe every trace of sawdust could have been removed.