"I begin to suspect," he said, "that you ought to have called me in sooner. You promised me an interesting evening and the first persons I run into are two men from the police. What has happened? Has Victor Dreyel got himself into a mess?"

"He was murdered half-an-hour ago." said Tom.

Maurice Wallion bit his lip and cast a peculiarly keen look at the young man; then he slowly took his way to the study, looked round and said: "Too late, I see. Where and how did it happen?"

Tom, in an incoherent manner, told him. He mentioned his conversation with Dreyel at eight o'clock, the wooden doll, the telegram and the mysterious footsteps, finishing up with the suspicions of the police in regard to a certain young girl in grey.

But he went no further. Now, having recapitulated all the details in order, he himself for the first time got a clear insight as to how matters stood. A cold sweat came over him.

Up there, in the studio ... a dead man; down here in the very next room an unknown girl, possibly an adventuress, most likely Dreyel's murderess, in spite of her assertions to the contrary ... concealed in his own abode!

"I do believe you are turning pale," observed Wallion, who had been narrowly studying his friend's face; "got anything more to tell me?"

Tom hesitated.

"Wallion," he said at last, "do you believe the poor girl did it?"

"Who? Your girl in grey, the stranger? How should I know? Funnier things than that have happened."