There was no one in the corridor. He hastened to the stairs. There was no one on the staircase. He descended in all haste, and reached the boulevard in time to see a fiacre turning the corner of the Rue du Petit-Banquier, on its way back to Paris.

Marius rushed headlong in that direction. On arriving at the angle of the boulevard, he caught sight of the fiacre again, rapidly descending the Rue Mouffetard; the carriage was already a long way off, and there was no means of overtaking it; what! run after it? Impossible; and besides, the people in the carriage would assuredly notice an individual running at full speed in pursuit of a fiacre, and the father would recognize him. At that moment, wonderful and unprecedented good luck, Marius perceived an empty cab passing along the boulevard. There was but one thing to be done, to jump into this cab and follow the fiacre. That was sure, efficacious, and free from danger.

Marius made the driver a sign to halt, and called to him:⁠—

“By the hour?”