So Terence McGuire learned that Alvord Hendricks bought some hyoscyamine, on a doctor’s prescription, about a month ago—the same to be used to relieve a serious case of earache.

But there was no record of his having bought hyoscyarnus, which was the deadly henbane used in the medicine dropper-nor was there any other record of hyoscyamine against him.

Satisfied that he had learned all he could, Fibsy continued his round of drug-store visits, in an ever-widening circle, but got no information on any henbane sales whatever.

“Nothin’ doin’,” he told himself. “Whoever squirted that henbane from that squirter into that ear—brought said henbane from a distance, which, to my mind, indicates a far-seeing and intelligent reasoning power.”

His present duty done, he started forth on his own tour of investigation. He went to a small boarding house, in an inconspicuous street, the address of which had been given him by Mr. Barton, and asked for Mr. Hanlon.

“He ain’t home,” declared the frowning landlady who opened the door.

“I know it,” returned Fibsy, nonchalantly, “but I gotta go up to his room a minute. He sent me.”

“How do I know that?”

“That’s so, how do you?” Fibsy’s grin was sociable. “Well, look here, I guess this’ll fix it. I’m errand boy to—you know who—” he winked mysteriously, “to the man he takes his acrobat lessons off of.”

“Oh,” the woman looked frightened. “Hush up—it’s all right. Only don’t mention no names. Go on upstairs—third floor front.”