He held out his lens, and indicated the part of the floor he had been scrutinising. Burnley knelt down and, using the lens, began to push open the interstices of the pile. They were full of a curious kind of dust. He picked out some and examined it on his hand. ‘Sawdust!’ he exclaimed. ‘Sawdust,’ returned the other, in a pleased and important tone. ‘See here,’--he traced a circle on the floor--‘sawdust has been spilled over all this, and there’s where the cask stood beside it. I tell you, Burnley, mark my words, we are on to it now. That’s where the cask stood while Felix, or Boirac, or both of them together, packed the body into it.’ ‘By Jove!’ Burnley cried again, as he turned over this new idea in his mind. ‘I shouldn’t wonder if you are right!’ ‘Of course I’m right. The thing’s as plain as a pike-staff. A woman disappears and her body is found packed in sawdust in a cask, and here, in the very house where she vanishes, is the mark of the same cask--a very unusual size, mind you--as well as traces of the sawdust.’ ‘Ay, it’s likely enough. But I don’t see the way of it for all that. If Felix did it, how could he have got the cask here and away again?’ ‘It was probably Boirac.’ ‘But the alibi? Boirac’s alibi is complete.’ ‘It’s complete enough, so far as that goes. But how do we know it’s true? We have had no real confirmation of it so far.’ ‘Except from François. If either Boirac or Felix did it, François must have been in it, too, and that doesn’t strike me as likely.’ ‘No, I admit the old chap seems all right. But if they didn’t do it, how do you account for the cask being here?’ ‘Maybe that had something to do with it,’ answered Burnley, pointing to the marble group. Lefarge started. ‘But that’s what was sent to Felix, surely?’ he cried, in surprise. ‘It looks like it, but don’t say anything. Here’s François. Let us ask him.’ The butler entered the room holding a slip of paper which he gave to Lefarge. ‘Suzanne’s address, messieurs.’ Lefarge read:-- ‘Mlle. Suzanne Daudet, rue Popeau, 14b, Dijon.’ ‘Look here, François,’ said the detective, pointing to the marble group. ‘When did that come here?’ ‘Quite recently, monsieur. As you see, Monsieur is a collector of such things, and that is, I think, the latest addition.’ ‘Can you remember the exact day it arrived?’ ‘It was about the time of the dinner-party, in fact, I remember now distinctly. It was that very day.’ ‘How was it packed?’ ‘It was in a cask, monsieur. It was left in here that Saturday morning with the top boards loosened for Monsieur to unpack. He never would trust any one to do that for him.’ ‘Was he, then, in the habit of getting these casks?’ ‘Yes, monsieur, a good many of the statues came in casks.’ ‘I see. And when was this one unpacked?’ ‘Two days later, monsieur, on Monday evening.’ ‘And what happened to the cask?’ ‘It was returned to the shop. Their cart called for it two or three days later.’ ‘You don’t remember exactly when?’