"Oh, a very dim, very incomplete, but still sufficient truth! With that clue to guide me, I was bound to find the way. Do you follow me, chief?"

M. Dudouis sat silent. The same phenomenon that had taken place in Ganimard was evidently taking place in him. He muttered:

"If it's not one of the guests, nor the servants, nor the private detectives, then there's no one left...."

"Yes, chief, there's one left...."

M. Dudouis started as though he had received a shock; and, in a voice that betrayed his excitement:

"But, look here, that's preposterous."

"Why?"

"Come, think for yourself!"

"Go on, chief: say what's in your mind."

"Nonsense! What do you mean?"