"Could she, wearing an automobile mask, see either side of herself without turning?" asked The Thinking Machine, pointedly. "Had you intended to stab her, say while the car was in motion and had the knife in your hand, even in daylight, could she have seen it without turning her head? Or, if she had had the knife, could you have seen it?"
Curtis shuddered a little.
"No, I don't believe so."
"Was she blonde or brunette?"
"Blonde, with great clouds of golden hair," said Curtis, and again there was admiration in his tone.
"Golden hair?" Hatch repeated. "I understood Medical Examiner Francis to say she had dark hair?"
"No, golden hair," was the positive reply.
"Did you see the body, Mr. Hatch?" asked the scientist.
"No. None of us saw it. Dr. Francis makes that a rule."
The Thinking Machine arose, excused himself and passed into another room. They heard the telephone bell ring and then some one closed the door connecting the two rooms. When the scientist returned he went straight to a point which Hatch had impatiently awaited.