"Never mind that," said The Thinking Machine. "You had better stay where you are. You will be locked up at the proper moment. Mr. Hatch, please 'phone for Detective Mallory."
Hatch arose and passed into the adjoining room. "You tricked me," the woman screamed suddenly, fiercely.
"Yes," the other agreed, complacently. "Next time be sure you know your own husband. Meanwhile where is Harrison?"
"Not another word," was the quick reply.
"Very well," said the scientist, calmly. "Detective Mallory will be here in a few minutes. Meanwhile I'll lock this door."
"You have no right----" the woman began.
Without heeding the remark, The Thinking Machine passed into the adjoining room. There for half an hour he talked earnestly to Hatch and Doane. At the end of that time he sent a telegram to the manager of the Lincoln Club in Pittsburg, as follows:
"Does your visitors' book show any man, registered there in the month of January three years ago, whose first name is Harry or Henry? If so, please wire name and description, also name of man whose guest he was."
This telegram was dispatched. A few minutes later the door bell rang and Detective Mallory entered.
"What is it?" he inquired.