'EUGEN,' Prince Aribert called softly.

At the sound of his own name the young man in the cellar feebly raised his head and stared up at the grating which separated him from his two rescuers.

But his features showed no recognition.

He gazed in an aimless, vague, silly manner for a few seconds, his eyes blinking under the glare of the lantern, and then his head slowly drooped again on to his chest.

He was dressed in a dark tweed travelling suit, and Racksole observed that one sleeve--the left--was torn across the upper part of the cuff, and that there were stains of dirt on the left shoulder.