He walked with the peculiar waddle affected by young Dutchmen of a certain class, and was soon out of sight round the corner of the street.

French opened the door with a masterkey and secured it carefully, leaving one of his men to guard it.

He searched the rooms on the ground floor and finally ascended to Quest's study.

The Professor was still enjoying his cigar.
"Say, where's Quest ?" the Inspector asked promptly.
"Have you let him out already ?" the Professor replied, in a tone of mild surprise.

"I thought he was in the Tombs prison." The Inspector pressed on without answering.