In short, The Shadow never allowed anything to distract him.

Half a minute was the interval that The Shadow allowed.

The Shadow allowed no hint of his satisfaction to show on his face.

The Shadow allowed the grim farce of death to proceed.

The Shadow hadn't allowed them time to place their shots.

At the far end, The Shadow allowed them to see him.

Had The Shadow allowed them time, they would have guessed what to do.

The Shadow allowed his body to fall limply, ignoring the pain of the impact.

The Shadow, hatless, allowed a smile to appear upon his lips.

The Shadow allowed a smile of satisfaction to cross his face.