"Know who they are?" gasped Christopher.
"Yes."
It was obvious the expert was enjoying the lad's mystification.
"You don't mean you know their names," persisted Christopher.
"Indeed I do—all their many names, for they have almost as long a list of them as you have yourself."
The inspector evidently considered this a good joke, for he laughed heartily at it without noticing how the great Mr. Burton glared at him.
"And not only do I know their names, but I have their pictures as well," he continued, when he had done laughing. "What do you think of that?"
"Met them before, have you?" interrogated Mr. Burton, his disapproval mollified to some degree by his pride in his son.
"Oh, I know all about that pair," replied the inspector; "if they prove to be the couple I think them. No wonder your clerk failed to suspect them. They are very polished gentleman."
"They were indeed, sir," Hollings put in. "They had a million-dollar air about them."