Forced on by a nameless fear, Vail ran up, three steps at a time, in the dog’s wake. He reached the second floor, just as two or three of his guests, in the sketchiest attire, came stumbling out into the broad upper hall.

At sight of Thaxton on the dim-lit landing they broke into a clamor of questions. For reply Vail pressed the light switch, throwing the black spaces into brilliant illumination. Then his glance fell on Macduff.

The collie had halted his headlong run just outside a door at the head of the hall. At the oaken panels of this he was tearing madly with claws and teeth.

As Vail hurried to him, the dog ceased his frantic efforts; as though aware that the man could open the door more easily than could he. And again he tossed his muzzle aloft, making the house reverberate to that hideously keening wolf-howl.

The hall was full of jabbering and gesticulating people, clad in night clothes. Vail pushed through them to the door at which Mac had clamored. It was the door of Thaxton’s own bedroom. He turned the knob rattlingly. The door was locked. The others crowded close, wildly questioning, getting in one another’s way.

Vail stepped back, colliding with Clive Creede and Joshua Q. Mosely. Then, summoning all his strength, he hurled himself at the door. The stout oak and the old-fashioned lock held firm.

Thaxton stepped back again, his muscular body compact. And a second time he crashed his full weight at the panels. Under the catapult impact the lock snapped.

The door burst open, flinging Vail far into the dense blackness. Clive Creede, close behind him, groped for the light switch just inside the threshold and pressed it, flooding the room with light.

There was an instant of blank hush. Then Mrs. Mosely screamed, shrilly, in mortal terror.

Chapter XI
WHAT LAY BEYOND THE SMASHED DOOR