"Darrin, you are a fool!" hissed the division officer.
"I am much obliged to you, sir, for your good opinion," Dave answered, in an even voice.
For an instant the lieutenant frowned deeply. Then his face cleared.
His glance became almost friendly as he continued:
"Darrin, I think it probable that you will have a chance to repair your bad work of last night."
"Sir?"
"Last night you told me that you had noted the number of the taxicab in which the young woman escaped me."
"I did, sir."
"Perhaps you still remember that number. Indeed, I am sure that you must."
"I do remember the number, sir."
"What was it?" asked Cantor, eagerly.