Without exchanging a bow or a hand-shake with any one, he descended to the pavement and walked to the boulevard, where he opened the door of a coups whose interior showed a complete ambulant library—a writing table with paper, ink, and lamp, pockets full of books and pamphlets.

Just as he was about to enter, a voice stopped him.

He turned; it was one of his old pupils, who had recently become a physician in the suburb of Gentilly.

"What is it?" asked Saniel.

"I want to ask you to come and assist me in a curious case of spasms, where your intervention may be decisive."

"Where?"

"At the Maison-Blanche, a poor woman. What day could you give me?"

"Is it urgent?"

"Yes."

"In that case I will go at once. Give the address to my coachman, and get in with me."