Hanaud was stung at last out of his calm.
"What is that?" he cried in a sharp voice.
"Yes, twice, Monsieur. Each time he has scraped through, that is true. He has powerful friends, and witnesses have been spirited away. But he is known! Jean Cladel! Yes, Jean Cladel!"
"Jean Cladel, Herbalist of the street Gambetta," Hanaud repeated slowly. "But"—and he leaned back in an easier attitude—"you will see my difficulty, Monsieur Waberski. Ten o'clock is a public hour. It is not a likely hour for any one to choose for so imprudent a visit, even if that one were stupid."
"Yes, and so I reasoned too," Waberski interposed quickly. "As I told you, I could not believe my eyes. But I made sure—oh, there was no doubt, Monsieur Hanaud. And I thought to myself this. Crimes are discovered because criminals, even the acutest, do sooner or later some foolish thing. Isn't it so? Sometimes they are too careful; they make their proofs too perfect for an imperfect world. Sometimes they are too careless or are driven by necessity to a rash thing. But somehow a mistake is made and justice wins the game."
Hanaud smiled.
"Aha! a student of crime, Monsieur!" He turned to Betty, and it struck upon Jim Frobisher with a curious discomfort that this was the first time Hanaud had looked directly at Betty since the interview had begun.
"And what do you say to this story, Mademoiselle?"
"It is a lie," she answered quietly.
"You did not visit Jean Cladel in the street of Gambetta at ten o'clock on the morning of the 7th of May?"