She could have sworn some one was following them.

She said nothing about a figure a few feet behind them.
The lively, all-night restaurant was thronged.

Halsey seemed to throw himself into the gayety with reckless abandon, ordering about twice as much as they could eat and drink.

But in spite of the fascination of the scene, Constance could not forget the dark figure skulking behind them in the shadow of the street.
Once she looked up.

At another table she could just catch a glimpse of Drummond, of the Burr Detective Agency, alone, oblivious.
Never did he look at them.