“Better wait till evening,” suggested Slade. “There will be less danger of interruption then.”

Helen turned away. She feared an involuntary cry of horror would betray her if she remained longer. Steadying herself with great difficulty, she stole out of the laboratory and slipped back into her room. Her watch showed half past five, and the inoculation would probably not take place for an hour or two. In the meantime she wanted to think and if possible find a way of escape, but the fierce pounding of the blood against her temples seemed to preclude clear thinking.

Her only distinct thought was that she must flee from Azurecrest no matter what dangers and difficulties she might encounter. She felt that The Gray Phantom would gladly fling his life away in order to protect her, but in this instance his hands were tied. He could not make a single move without rendering her predicament worse, and that fact would restrain him, much as he might rebel against his enforced inaction. Mr. Shei’s men would point out to him that her safety depended on an unresisting attitude on his part. He could not know what she had just learned from the conversation between Slade and Tagala, that it was their intention to take her life, anyway.

Somehow, she told herself, she must manage to escape from the horrors awaiting her at Azurecrest. Even being clawed and torn by the savage dog seemed preferable to the slightest touch of Doctor Tagala’s hand. She shuddered whenever her imagination conjured up a vision of his repelling features, and a hoarse cry rose in her throat at thought of being inoculated with the fearful malady. Miss Neville’s maniacal outbursts were still ringing in her ears, and she remembered the hideous strains that had poured from the lips of the dying woman in the Thelma Theater.

The recollections filled her with sickening terror. With ghastly visions floating before her eyes, she rushed blindly from the room. The hall was deserted, and she scurried down the stairs as if pursued by a monster. She reached the outer door without hindrance, and a flickering hope began to stir within her as she scanned the wide stretch of lawn surrounding the house. The long shadows cast by the trees gave her an additional sense of safety. Swiftly, without a backward glance, she started to run. Her hopes rose higher and higher as she plunged into the thick shadows among the trees. In a few moments now, if her flight remained unnoticed, she would have reached the fence. Somehow she would manage to scale it, or maybe she could find an opening somewhere.

She quickened her pace, but of a sudden a low, rumbling growl sent a chill through her veins. She stopped, stood crouching behind the scraggy trunk of a hemlock, and glanced wildly in all directions. With great leaps and skips, a huge, black form was rushing toward her, its teeth gleaming ominously between slavering jaws. In a few moments it would be at her throat, and then—— Once more a vision of Doctor Tagala’s repulsive features filled her with dread. Again she looked about her, then raced swiftly in the direction where the shadows were thickest. Behind her the underbrush crackled beneath the paws of the savage beast. In a moment or two he would be snapping at her heels.

Again hope rose within her. A squatty shed loomed within a narrow clearing. With the strength of frenzy she sped toward it. If she could reach it before the dog could overtake her, she would be temporarily safe. A great terror urged her on with the speed of the wind. Now the dog was snatching at the hem of her fluttering skirt, but she was already at the door. With a final exertion of strength she pushed it open and rushed in, then slammed it shut behind her. With a deep breath of relief she lurched against the wall. Suddenly she recoiled as from a blow.

“What are you doin’ here?” queried a gruff voice.

She stared into the dusk around her. A few wisps of waning sunlight straggled in through a small window in the rear. Gradually, as her eyes grew accustomed to the dusk, she descried a stocky figure leaning over a shovel. It was the sour-faced individual who had opened the gate for her on her arrival at Azurecrest. Little by little, as her pupils responded to the dim light, she took in each detail of the scene. An amazed gasp slipped from her lips.

An oblong space had been torn up in the center of the flooring and on each side of it were little mounds of dirt. Instinctively she stepped closer and looked down into a rectangular hollow. She had a weird sensation that she was looking into a grave, and with a shudder she glanced up into the man’s face.