‘If Felix did it,’ Burnley continued, ‘it would certainly clear up the difficulty of the authorship of the letter. He is the only man we have discovered so far that would have had the necessary knowledge to write it. He was present at the Café Toisson d’Or, and had joined with Le Gautier in the lottery, and therefore knew that part of it. The discussion about criminals evading the police and the bet between Le Gautier and Dumarchez, neither of which we believe took place, he could have invented to account for the receipt of the cask, and finally, he would naturally know the details about the last journey of the cask, since he himself arranged them.’
‘Quite so,’ cried Lefarge eagerly, ‘it all works in. I believe we are beginning to see light. And we must not forget Suzanne’s evidence about the note. It is clear Madame and Felix had an understanding for that night. At least, we know of messages passing between them and the reply of Felix points to an assignation.’
‘An important point, certainly. And yet,’ the Chief objected, ‘there are difficulties. That singular point about the hatpins, for example. What do you make of that, Lefarge?’
‘Agitation, monsieur. I would suggest that this lady was so excited at the action she was about to take that she hardly knew what she was doing.’
The Chief shook his head.
‘I don’t know that that is very satisfactory,’ he said. ‘Might it not, as also the fact that she took no luggage, mean that she never left the house at all? That she was murdered that same evening of the dinner-party, and the hat and coat removed to make a false scent? I suppose you have considered that?’
Burnley answered at once.
‘I thought of that first of all, monsieur, but I dismissed it as impossible for the following reasons. First, if she was murdered on Saturday night, what was done with the body? It could not have been put into the cask in the study, as I had thought at first, for that was full. The statue was not unpacked till two nights later, on Monday. We know, indeed, it was not put into the cask, for that was returned direct to Messrs. Dupierre’s and found to be empty. Secondly, it could not have been hidden anywhere else in the house, for François and Suzanne made a thorough search on the Sunday, and the corpse would have been too big a thing for them to have overlooked. Further, if she was murdered in the house, either Felix, Boirac, or some third person or persons must have done it. Felix could hardly be the man, as I do not see how he could have removed the body without a confederate, and we have not found such. Boirac would perhaps have had more chances of disposing of the body, though I do not see how, but he had a complete alibi. Lastly, I felt strongly that François, the butler, was to be believed. I could not imagine him party to the murder, and I did not see how it could have been done at the time you suggest without his knowledge.’
‘That certainly seems probable. In fact, when you add it to M. Lefarge’s point that the body must have been put into the cask in London, it seems to me almost conclusive.’
‘I also feel sure it could not have been done then,’ observed Lefarge, ‘though I don’t agree with Mr. Burnley that Boirac’s alibi is good.’