to the hotel and
leaving the note for Mrs. Duvall, you made it possible for me to find
her, and if I hadn't"--he paused and looked at Grace with a troubled
face--"there's no knowing what might have happened. Tell the chauffeur
to drive to the Grand Central Station."

It was three o'clock when the cab drew up at the curb. In spite of the
lateness of the hour, there were a good many persons moving in and out
of the station. Duvall got out and motioned to Grace and Leary to do the
same.

"We will all go in by different doors," he explained, "and meet in the
general waiting-room. If the women are not there, Mrs. Duvall will look
through the women's room. If you see them, and they make no effort to
escape, wait for me to join you. If they do try to get away, detain them
until I come."

It was Duvall himself, however, who first caught sight of the objects of
their pursuit. They sat, both apparently asleep, on a bench in one
corner of the main waiting room. The detective was not certain of their
identity, heavily veiled as they were, until he had gone quite close up
to them. Then he saw that they were Miss Ford and the woman who had
escaped from him while in the cab the night before.

He leaned over and tapped the Ford girl on the shoulder.

"Wake up, Miss Ford," he exclaimed.

The girl shivered, then struggled to her feet. Her companion appeared to
be too dazed to move, although she opened her eyes and stared at him
with a vague and terrified face.

"Will you come with me quietly," he said, "or shall I call a policeman
and have you put under arrest for the attack upon my wife?" He addressed
himself more particularly to the woman who was sitting.

She now rose and made a movement as though to attempt to escape. Duvall
grasped her by the arm.

"It will be quite useless to attempt it, Miss Norman," he said. "I have
help close at hand in case it is needed." He glanced toward Grace and
Leary, who were now approaching. "I do not wish to use any violence, of
course, but you and your friend are going back to the apartment on
Ninety-sixth Street with me."

His voice, his manner, made it apparent to the two women that escape was
hopeless. They seemed suddenly to realize it, to give up further ideas
of resistance.

"Very well," Miss Norman said, "we will go."

"Good." Duvall turned to Leary. "Take those two suit cases, Leary, and
get another cab." In silence the little party made its way to the
street. The two women sai