When the driver asked, "Where?" Marmus replied quietly:
"Home."
"Where is your home, Monsieur?" asked the driver.
"Number three," Marmus replied.
"What street?" asked the driver.
"Ah, you are right, my friend. But this is extraordinary," he said, taking the driver into his confidence. "I have been so busy comparing the hyoides and the caracoides—yes, that's it. I will catch Sinard in the act. At the next session of the Institute he will have to yield to evidence."