"Where is Jack this evening?" he asked.

"Dining out with friends. Why?"

"Will you see him to-night?"

"I can if necessary."

"Do. Tell him to come down to my room as near eight o'clock to-morrow morning as he can. I've changed my mind."

"Oh!" cried Helen joyously. "Then you've concluded I'm right, after all?"

"No," said Darrow; "but if this thing carries out to its logical conclusion, I'm going to need a good bull-terrier pup!"

CHAPTER V

A SCIENTIST IN PINK SILK

The next morning promptly at eight o'clock Jack Warford, in response to a muttered invitation, burst excitedly into Percy Darrow's room. He found the scientist, draped in a pale-pink silk kimono embroidered with light-blue butterflies, scraping methodically at his face with a safety-razor. At the sight the young fellow came to an abrupt stop, as though some one had met him with a dash of cold water in the face.