Forgetting her errand, Grace began following him, keeping not more than twenty feet behind him.

As he neared the first cross street the man glanced furtively about him, then, turning into the intersecting street, hurried on, almost at a run.

Grace, bent only on seeing the stranger's face, unhesitatingly dogged his footsteps.

It was now after six o 'clock and growing darker with every moment.

Block after block they went, but now Grace kept a distance of a hundred feet or more between herself and the man she was following.