There came a strange interruption. The Doctor, helpless on-looker, had at length evolved an idea out of the bewilderment in his mind. He opened his mouth and emitted a tremendous, deep, ear-shattering bellow!

Nicholas Devine sent the girl spinning to the floor with a vicious shove, and turned his blazing eyes on Horker, who was drawing in his breath for a repetition of his roar. "Quiet!" he rasped, his red orbs boring down at the other. "Quiet, or I'll muffle you!" Closing his eyes, the Doctor repeated his mighty shout.

The demon snatched the blanket from the couch, tossing it over the figure of the Doctor, where it became a billowing, writhing heap of brown wool. He turned his gaze on Pat, who was just struggling to her feet, and moved as if to advance toward her.

He paused. She had retrieved the Doctor's revolver from the floor, and now faced him with the madness gone out of her eyes, supporting the weapon with both hands, the muzzle wavering toward his face.

"Drop it!" he commanded. She felt a recurrence of fascination, and an impulse to obey. Out of the corner of her eye, she saw the Doctor's head emerging from the blanket as he shook it off.

"Drop it!" repeated Nicholas Devine.

She closed her eyes, shutting out the vision of his dominant visage. With a surge of terror, she squeezed the trigger, staggering back to the couch at the roar and the recoil.

She opened her eyes. Nicholas Devine lay in the center of the room on his face; a crimson spot was matting the hair on the back of his head. She saw the Doctor raise a free hand; he was working clear of his bonds.

"Pat!" he said softly. He looked at her pale, sickened features. "Honey," he said, "sit down till I get free. Sit down, Pat; you look faint."

"Never faint!" murmured the girl, and pitched backward to the couch, with one clad and one bare leg hanging in curious limpness over the edge.