The girl looked wonderingly as he opened the lid and drew forth a slip of porcelain covered with a thin film of black ink and two white cards.
His hand shook as he placed them on the table and suddenly the girl understood.
"You want my finger prints ?" she asked and he nodded.
"I just hate asking you," he said, "but----" "Show me how to do it," she interrupted and he guided her.
He felt disloyal--a very traitor, and perhaps she realised what he was thinking, for she laughed as she wiped her stained finger tips.
"Duty's duty," she mocked him, "and now tell me this--are you going to keep me under observation all the time ?" "For a little while," said Tarling gravely.

"In fact, until we get the kind of information we want." He put away the box into his pocket as she shook her head.
"That means you're not going to tell us anything," said Tarling.

"I think you are making a very great mistake, but really I am not depending upon your saying a word.

I depend entirely upon----" "Upon what ?" she asked curiously as he hesitated.
"Upon what others will tell me," said Tarling "Others?
What others ?" Her steady eyes met his.
"There was once a famous politician who said 'Wait and see,'" said Tarling, "advice which I am going to ask you to follow.

Now, I will tell you something, Miss Rider," he went on.