The latter had withdrawn to the far side of David's couch, whence he had watched, with alternate amusement and contempt, all that took place between these two. He now advanced, with the air of one who has the mastery of a difficult situation, and again proffered his services. There was mockery in his voice; before he addressed himself to his task he repeated his warning to Sajipona, reminding her that it might be better not to revive too suddenly a past filled, possibly, with disagreeable surprises. His warning waved impatiently aside, Raoul turned swiftly upon David, his restless, irritating eyes fixed in a steady glare that, bit by bit, broke down the latter's opposition. Forcing his victim to be seated upon the side of the couch, he stood over him, for a short space, in silence. There was nothing in all this of the gesture and mummery traditionally accompanying certain spectacular manifestations of hypnotism; neither were the two men at any time in physical contact with each other. An onlooker would say that the younger man was unconsciously brought into a passive condition by the exertion upon him of a stronger will, intensified by facial peculiarities that were well calculated to hold the attention. Eyes like Raoul's, although exciting repugnance, at the same time arouse curiosity. Once absorbed in probing their baffling depths, the object of their regard yields to a sort of baleful fascination hard to shake off. In former years David had been used by Raoul in various psychological experiments, and was thus accustomed, on such occasions, to surrender himself to the other's compelling influence. This habit was now unconsciously revived. The old grooves of thought and conduct were reopened, as it were, by the resumption of a parallel outward condition. As a result, David fell into a state of complete mental inertia. To this influence Raoul now added the force of direct suggestion, or, rather, verbal command. The subtle arts of apparent submission, or, at the least, mild expostulation which he usually employed in gaining his ends with an intractable opponent, were cast aside. His attack was concentrated, he spoke scornfully, without compromise in utterance or meaning, so that his hypnotized subject was forced either to resist or to be carried along by him. Through this direct, positive method, he took David back, step by step, over events in the immediate past that had become obscured in his memory.