“Back at first base. In Silas Harshaw’s apartment. That’s where the answer is. We’ll find it” — Cardona was paraphrasing The Shadow — “we’ll find it if we search.

“Look for the trail at the inventor’s apartment. That’s why I wanted this talk to-day. We’ve got to go through Harshaw’s with a fine-tooth comb.”

“I think so,” said Biscayne. “I begin to see your logic.

“Harshaw’s servant has disappeared. A cracksman was killed in the place. Burglary seemed to be the motive. But — are we entirely sure?”

“We are not!” replied Cardona emphatically. “Maybe Homer Briggs was in the racket. Maybe some evidence was left there.

“A man got away out of the place, but he didn’t have much of a chance to take anything with him. I’m going through every nook in the joint; and I want you to be with me.”

“Excellent,” said Biscayne. “By the way, Cardona, what has developed in the search for Briggs?”

“There was a big gang fight two nights ago,” said Cardona. “A bunch of gorillas mixed; some were killed.

“There’s one bird in the morgue I saw to-day. Looks something like Homer Briggs, according to the description of bellhops from the Redan Hotel.

“They’re pretty sure about it, but that makes it all the worse. If Briggs is dead, he can’t talk.