Wallion gazed thoughtfully at Tom.

"Oh, very well," was all he said. He thrust his hands into his pockets and took a good, long look round the studio. The body had been removed, but a dark red spot, scarcely dry, showed on the grey linoleum in front of the bookcase; it was but a small stain which could easily have been covered with an inverted teacup, but it was of supreme importance, and all eyes were automatically turned upon it, as Wallion bent over it. For several seconds there was no sound save the patter of the rain on the glass roof, and then Wallion inquired as to the whereabouts of the body.

"It has been taken into the bedroom," answered Aspeland. "The doctor says death must have been instantaneous, the man having been stabbed in the back," he pointed to the silent gentleman with the grey beard by way of introduction, and said, "Doctor Baum."

Having bowed to each other, the doctor laconically remarked, "A most cold-blooded murder—the work of an expert. Between the shoulder-blades—straight through the heart—internal hemorrhage, death practically instantaneous."

"Does the wound give any clue to the instrument used?"

"Yes, it must have been a sharp, long and narrow blade, possibly a daggerlike weapon, used with unerring precision."

Aspeland interrupted the doctor impatiently.

"Would you like to view the corpse?" he inquired of Wallion. "I am not against hearing your opinion," he added, somewhat clumsily, and called to one of the detectives: "Tell the porter's wife to come up again."

Then the superintendent, Wallion and the doctor proceeded to Dreyel's small, untidy bedroom. Tom followed in their wake, but he could not bring himself to go near the iron bedstead from which the doctor lifted the sheet.

"Let me look at his hands," said Wallion with decision, "and then help me to turn him over."