"Ah," he exclaimed. Then to Hatch: "Let's go, Mr. Hatch. Thank you," this last to the manager, who had been a puzzled witness.
Once on the street, side by side with The Thinking Machine, Hatch was bursting with questions, but he didn't ask them. He knew it would be useless. At last The Thinking Machine broke the silence.
"That girl, Miss Regnier, _was murdered_," he said suddenly, positively. "There have been four attempts to murder Henley."
"How?" asked Hatch, startled.
"By a scheme so simple that neither you nor I nor the police have ever heard of it being employed," was the astonishing reply. "_It is perfectly horrible in its simplicity_."
"What was it?" Hatch insisted, eagerly.
"It would be futile to discuss that now," was the rejoinder. "There has been murder. We know how. Now the question is--who? What person would have a motive to kill Henley?"
III.
There was a pause as they walked on.
"Where are we going?" asked Hatch finally.