The Shadow was still acting on knowledge he had learned twenty-four hours earlier!

The Shadow had acted from within the beleaguered house.

He was sure that The Shadow would act again, this evening.

The noise of the engine was another reason why The Shadow had acted as he did.

The Shadow acted in the manner that he knew the murderer would expect.

Until the truth was out, The Shadow could not have acted.

The Shadow had acted with merciful speed to save life, not to destroy it.

Then, as the situation reached its most crucial stage, The Shadow acted!

Before the man could make a decision, The Shadow acted.

But before the words had left the man's lips, The Shadow acted.