"The hat-box, of course! The cardboard hat-box which was standing on the table. That's where he hid the notes. They were there all through our search."
"Impossible!"
"Why, yes, we always overlook that particular hiding-place, the one just under our eyes, within reach of our hands! How could one imagine that a thief would leave sixty thousand francs in an open cardboard box, in which he places his hat when he comes in, with an absent-minded air? That's just the one place we don't look in.... Well played, M. Dutreuil!"
The inspector, who remained incredulous, repeated:
"No, no, impossible! We were with him and he could not have started the fire himself."
"Everything was prepared beforehand on the supposition that there might be an alarm.... The hat-box ... the tissue paper ... the bank-notes: they must all have been steeped in some inflammable liquid. He must have thrown a match, a chemical preparation or what not into it, as we were leaving."
"But we should have seen him, hang it all! And then is it credible that a man who has committed a murder for the sake of sixty thousand francs should do away with the money in this way? If the hiding-place was such a good one--and it was, because we never discovered it--why this useless destruction?"
"He got frightened, M. Morisseau. Remember that his head is at stake and he knows it. Anything rather than the guillotine; and they--the bank-notes--were the only proof which we had against him. How could he have left them where they were?"
Morisseau was flabbergasted:
"What! The only proof?"