‘Well now, I was rather inclined to accept the alibi,’ said M. Chauvet. ‘What part of it do you consider doubtful, Lefarge?’

‘All of it from the time Boirac left the works. We don’t know whether that American exists at all. As far as I can see, the whole thing may be an invention.’

‘That is quite true,’ admitted the Chief, ‘but it didn’t seem to me so very important. The crucial point, to my mind, is the hour at which Boirac says he returned home—a few minutes past one. That is confirmed by François and by Suzanne, and I think we may accept their statement. But we have a further rather convincing incident. You may recollect Boirac stated that when he was halfway home from the Gare Quai d’Orsay it began to rain? You very properly tried to check even so small a point by asking François if his master’s coat was wet. He replied that it was. Now, I made inquiries, and I find that night was perfectly fine till almost one o’clock, when a thick, wetting rain began to fall. We know, therefore, quite definitely that Boirac was out until the time he said. Therefore he could not have done the deed before 1.15. Also, we know that he could not have done it after that hour, because the lady was gone, and also the butler and maid were about. Therefore, if Boirac did it at all, it must have been after that night.’

‘That seems unquestionable, monsieur,’ said Lefarge, ‘and when you add to that the fact that we have, so far at any rate, been quite unable to connect Boirac with the letter or the cask, and that we are practically certain Madame travelled to London, I think he may almost be eliminated from the inquiry. What do you say, Burnley?’

‘Well, I think it’s a little so soon to eliminate any one from inquiry. I confess that point of motive struck me as being very strong against Boirac.’

‘That also, by the way, seems to show the deed was not done by Boirac that night,’ the Chief went on. ‘Your point is that he killed his wife because she had run away with Felix. But if he came home and found her there, she obviously hadn’t run away. Hence the motive, for that night at least, falls to the ground.’

The three men laughed, and M. Chauvet resumed:—

‘Now, to sum up our present position. We know that Mme. Boirac was murdered between 11.30 p.m. on the Saturday of the dinner-party, and the following Monday evening, when the letter purporting to be from Felix and ordering the statue, was written. Obviously only Felix, Boirac, or some third person could be guilty. There is not, so far, a scintilla of evidence of any third person being involved, therefore it almost certainly was one of the other two. Taking Boirac first, we find that under certain circumstances he would have had a motive for the crime, but we have not yet been able to obtain any evidence that these circumstances existed. Apart from this, we can find nothing whatever against him. On the other hand, he has established a strong alibi for the only time during which, so far as we can now see, he could have committed the crime.

‘Against Felix there are several suspicious circumstances. Firstly, it is proved he received a note from Madame, presumably arranging a meeting. Then we know he took advantage of the husband’s absence on the night of the dinner to have a private interview with her. That went on from 11.00 till at least 11.30, and there is reason to believe, though not proof, till 1.00. Then we believe Madame went to London, either actually with Felix, or at the same time. We conclude that for three reasons. First, she wrote to her husband that she had done so. The value of this evidence will, of course, depend on the opinion of our handwriting experts, whose report on the genuineness of this letter we have not yet received. Second, she could not have remained in the house, either alive or dead, as it was thoroughly searched by the servants, who found no trace of her. Neither could her body have been put in the cask in the study, for that contained the statue, and was not unpacked till the following Monday evening. Third, it is certain from the journeyings of the cask that the body was put into it in London, for the simple reason that it could not have been done anywhere else. Therefore she must have travelled to that city.

‘Further, the letter presumed to be written to Felix by Le Gautier could be reasonably accounted for if Felix himself wrote it as a blind to cover his actions with the cask, should such be discovered. It is clear that it was written with some such purpose, as half of it—all about the bet and the test—is entirely untrue, and evidently invented to account for the arrival of the cask. Now, we may take it, Le Gautier did not write that letter. On the other hand, Felix is the only man we have yet found who had sufficient information to do so.