"Let's see you, then."

"But—" Horror was in his voice.

"No, Dr. Carl!" Pat interjected in fright. "I won't let him!"

"I thought you declared yourself out of this," said Horker with a shrewd glance at the girl.

"Then I'm back in it! I won't let him do what you want—anyway, not that!"

"Pat," said the Doctor with an air of patience, "you want me to treat this affliction, don't you? Isn't that what both of you want?"

The girl murmured a scarcely audible assent.

"Very well, then," he proceeded. "Do you expect me to treat the thing blindly—in the dark? Do you think I can guess at the cause without observing the effect?"

"No," said Pat faintly.

"So! Now then," he turned to Nick, "Let's see this transformation."