"One of your monsters, I think," she replied shakily, "though we could see nothing. And the same thing attacked me and beat me. Look at my bruises!"

Shelton was examining the marks, and his fingers trembled as he touched his daughter's shoulder. He looked piteously into her eyes. "Are you sure, Lina? Sure? Did you see it?"

"No, no. But I felt and heard—the iron arms and the clamps and the buzzing. Oh, it was horrible!" The girl's voice rose hysterically.

"Oh, Lord! What have I done?" groaned Shelton. "It's true, then. Lina, listen: I've succeeded in making them invisible, and one got away this morning. But I thought—I thought—" He looked at Eddie, remembering his presence suddenly. "But I'm talking too much. It seems to me I remember having seen you before, young man."

"You have, sir," Eddie stated. "In the research laboratory of Universal Electric. I work with Borden."

"They've sent you to find me?" Shelton stiffened perceptibly.

"Indeed, not, sir. I'm on vacation and was merely passing by when I saw your daughter in danger, a danger I still do not understand."

"Yes, and he helped me to the road," Lina interposed, "and then lost his car at the hands of—"

"Silence!" the father thundered. But his eyes fell before the fire that instantly flashed in those of the girl.

"Now, you listen to me!" she returned angrily, "I've stayed on here with you until I'm nearly crazy with your everlasting puttering and experimenting—hearing your uncanny machines walking around in the middle of the night—seeing impossible sights—then, this thing I couldn't see but could feel. And you've gotten into such a state that you'll go crazy yourself, if you continue. Something's got to be done, I tell you. I can't stand it!"