The Shadow noticed that neither of the men sat with Peggy.
The Shadow noticed a closet door in the hall.
The Shadow had noticed no activity at the warehouse the time that he had passed it.
But The Shadow noticed a grim fact the moment his eyes surveyed the floor.
The Shadow, however, noticed that this smaller room was soundproof.
The Shadow noticed himself falling into a phenomenon that was familiar.
The Shadow lifted it and noticed that the top sheet was absent.
The Shadow had noticed a young man seated in a lounging chair, reading a magazine.
The Shadow had noticed it out of the corner of his narrowed eyes.
The Shadow didn't notice it, because the commissioner's car arrived by another street.