"Who are you, Mr. Van Dusen?" he asked at last. His tone was mild, even deferential.
"Was he masked?" insisted the scientist.
For a long while Dick was silent. Finally he arose and paced nervously back and forth across the room, glancing at the diminutive figure of The Thinking Machine each time as he turned.
"I won't say anything," he decided.
"Will you name the cause of the trouble you and Meredith had in Harvard?" asked the scientist.
Again there was a long pause.
"No," Dick said finally.
"Did it have anything to do with theft?"
"I don't know who you are or why you are prying into an affair that, at least on its face, does not concern you," replied Dick. "I'll say nothing at all – unless – unless you produce the one man who can and shall explain this affair. Produce him here in this room where I can get my hands on him!"
The Thinking Machine squinted at the sturdy shoulders with admiration in his face.
"Did it ever happen to occur to you, Mr. Herbert, that Harry Meredith and his father are precisely of the same build?"
Some nameless, impalpable expression crept into Dick's face despite an apparent fight to restrain it, and again he stared at the small man in the chair.
"And that you and Mr. Meredith are practically of the same build?"
Tormented by unasked questions and by those emotions which had compelled him to silence all along, Dick still paced back and forth. His head was whirling. The structure which he had so carefully guarded was tumbling about his ears. Suddenly he stopped and turned upon The Thinking Machine.
"Just what do you know of this affair?" he asked.
"I know for one thing," replied the scientist positively, "that you were not the man in the automobile."
"How do you know that?"
"That's beside the question just now."
"Do you know who was in the automobile?" Dick insisted.
"I can only answer that question when you have answered mine," the scientist went on. "Was Harry Meredith masked when he entered this room last Thursday night?"
Dick sat staring down at his hands, which were working nervously. Finally he nodded.
The Thinking Machine understood.
"You recognised him, then, by something he said or wore?"
Again Dick nodded reluctantly.
"Both," he added.
The Thinking Machine leaned back in his chair and sat there for a long time. At last he arose as if the interview were at an end. There seemed to be no other questions that he desired to ask at the moment.
"You need not be unnecessarily alarmed, Mr. Herbert," he assured Dick as he picked up his hat. "I shall act with discretion in this matter. I am not representing anyone who would care to make it unpleasant for you. I may tell you that you made two serious mistakes: the first when you saw or communicated with Mr. Randolph immediately after the plate was stolen the second time, and again when you undertook something which properly belonged within the province of the police."
Herbert still sat with his head in his hands as The Thinking Machine went out.
It was very late that night – after twelve, in fact – when Hutchinson Hatch called on The Thinking Machine with excitement evident in tone, manner, and act. He was accustomed to calling at any hour; now he found the scientist at work as if it were midday.
"The worst has happened," the reporter told him.
The Thinking Machine didn't look around.
"Detective Mallory and two of his men saw Miss Meredith this evening about nine o'clock," Hatch hurried on, "and bully-ragged her into a confession."
"What sort of a confession?"
"She admitted that she was in the automobile on the night of the ball and that – "
"Mr. Herbert was with her," the scientist supplied.
"Yes."
"And – what else?"
"That her own jewels, valued at twenty thousand dollars, were among those found in Herbert's possession when he was arrested."
The Thinking Machine turned and looked at the reporter, just casually, and raised his hand to his mouth to cover a yawn.
"Well, she couldn't do anything else," he said calmly.
CHAPTER V
Hutchinson Hatch remained with The Thinking Machine for more than an hour, and when he left his head was spinning with the multitude of instructions which had been heaped upon him.
"Meet me at noon in Detective Mallory's office at police headquarters," The Thinking Machine had said in conclusion. "Mr. Randolph and Miss Meredith will be there."
"Miss Meredith?" Hatch repeated. "She hasn't been arrested, you know, and I doubt if she will come."
"She will come," the scientist had replied, as if that settled it.
Next day the Supreme Intelligence was sitting in his private office. He had eaten the canary; mingled triumph and gratification beamed upon his countenance. The smile remained, but to it was added the quality of curiosity when the door opened and The Thinking Machine, accompanied by Dollie Meredith and Stuyvesant Randolph, entered.
"Mr. Hatch called yet?" inquired the scientist.
"No," responded the detective.
"Dear me!" grumbled the other. "It's one minute after twelve o'clock now. What could have delayed him?"
His answer was the clattering rush of a cab and the appearance of Hatch in person a moment later. He came into the room headlong, glanced around, then paused.