"We shall know that if we ever see it again," Professor Sykes had remarked in the quiet and security of that domed building surmounting the heights of Mount Lawson. But he said nothing now, as he stared at his companion with eyes that implored McGuire to arouse him from this sleep, this dream that could never be real. But McGuire, lieutenant one-time in the forces of the U. S. A., had seen it too, and he stared back with a look that gave dreadful confirmation. The observatory--Mount Lawson--the earth!--those were the things unreal and far away. And here before them, in brain-stunning actuality, were the markings unmistakable--the markings of Venus. And they were landing, these two, in the company of creatures wild and strange as the planet--on Venus itself! (_To be continued._) * * * * * [Advertisement: ] The Destroyer _By William Merriam Rouse_ [Illustration: "The connection is made," murmured Von Stein.] [Sidenote: Slowly, insidiously, there stole over Allen Parker something uncanny. He could no longer control his hands--even his brain!] The pencil in the hand of Allen Parker refused to obey his will. A strange unseen force pushed his will aside and took possession of the pencil point so that what he drew was not his own. It was the same when he turned from drawing board to typewriter. The sentences were not of his framing; the ideas were utterly foreign to him. This was the first hint he received of the fate that was drawing in like night upon him and his beautiful wife. Parker, a young writer of growing reputation who illustrated his own work, was making a series of pencil sketches for a romance partly finished. The story was as joyous and elusive as sunlight, and until to-day his sketches had held the same quality. Now he could not tap the reservoir from which he had taken the wind-blown hair and smiling eyes of Madelon, his heroine. When he drew or wrote he seemed to be submerged in the dark waters of a measureless evil pit. The face that mocked him from the paper was stamped with a world-old knowledge of forbidden things. Parker dropped his pencil and leaned back, tortured. He and his wife, Betty, had taken this house in Pine Hills, a small and extremely quiet suburban village, solely for the purpose of concentration on the book which was to be the most important work he had done. He went to the door of the room that he used for a studio and called: "Betty! Can you come here a moment, please?" * * * * * There was a patter of running feet on the stairs and then a girl of twenty, or thereabout, came into the room. Any man would have said she was a blessing. Her hair "was yellow like ripe corn," and her vivid blue eyes held depth and character and charm. "Look!" exclaimed Parker. "What do you think of this stuff?"