She dimly remembered that he had approached her slowly, nearer and nearer, and that his gleaming eyes had seemed to be two coals of fire in his head.

That was all she recalled, except that she had felt her senses reeling and leaving her. She had known no more until Doctor Lightfoot broke the dread spell, almost twelve hours afterward.

She had met the bogus Lightfoot in one of the outer rooms of the suite, not in the presence of the actress. Miss Lund had been in her bedroom at the time, but had not yet retired.

The nurse was horror-stricken to learn that her patient was missing, and equally at a loss to explain how she herself came to be without her uniform.

But Doctor Lightfoot possessed a sufficiently analytical mind to enable him to solve the puzzle, after a fashion, even before Nick arrived.

The detective had told him that the sight of an enemy of the actress’ had caused her seizure, and it was easy to put two and two together. This enemy had doubtless made himself up to represent the attending physician, had hypnotized the nurse, and then passed on, unhindered, to the actress’ room.

He had obviously subdued her in the same fashion, after which he had removed the unconscious nurse’s uniform and compelled Helga to don it.

The doctor remembered now that the two women were nearly alike in height and build. The nurse had dark-brown hair, in sharp contrast to Helga’s golden glory; but a wig could have remedied that. Neither was there any similarity in features, but veils can be counted on to hide such differences.

Doctor Lightfoot, despite his alarm, was rather proud of his ability to reason the thing out alone. He had no doubt that Helga Lund, under hypnotic influence, had accompanied the strange man from the hotel, against her will.

It would have been very easy, with no obstacle worth mentioning to interpose. No one who saw them would have thought it particularly strange to see the nurse and the doctor leaving together. At most, it would have suggested that they were on unusually good terms, and that he was taking her out for an airing in his car.