Despite the fact that his head still throbbed, he began to concentrate in the darkness. Zull’s analytical mind tried to piece together the incidents which had occurred.

First, he had been followed. His pursuer had taken up the trail outside the house where Richard Harkness had been murdered.

Zull could see no definite object in that — unless the man who had trailed him had suspected that he was on the way to trace some clew pertaining to the murder.

NO ONE had seen him pick up the pad — Zull was sure of that fact. The fact that he still had the pad was proof that his follower had not been cognizant of its importance.

There could be — so Zull argued — but one reason for the attack here in the darkness. The man following him had been trapped. He had made a successful attack, and had fled.

Despite the fact that the attacker had left no trace of his identity, Zull was positive that he knew who the man was.

Only one person could have planned such a bold onslaught and carried it through to such perfection. That was The Shadow.

“The Shadow!” whispered Herbert Zull through set teeth. “What brought him into this! If he—”

Perplexed thoughts followed.

To Inspector Zull, keen graduate of detective ranks, The Shadow was a reality — not a myth. He had often heard of this mysterious being, who so frequently dominated the affairs of New York’s underworld.