The prefecture knew less about the matter than did the hackney-coachman. They had no knowledge of any arrest having been made on the 6th of June at the mouth of the Grand Sewer.

No report of any agent had been received there upon this matter, which was regarded at the prefecture as a fable. The invention of this fable was attributed to the coachman.

A coachman who wants a gratuity is capable of anything, even of imagination. The fact was assured, nevertheless, and Marius could not doubt it, unless he doubted his own identity, as we have just said.

Everything about this singular enigma was inexplicable.

What had become of that man, that mysterious man, whom the coachman had seen emerge from the grating of the Grand Sewer bearing upon his back the unconscious Marius, and whom the police-agent on the watch had arrested in the very act of rescuing an insurgent? What had become of the agent himself?

Why had this agent preserved silence? Had the man succeeded in making his escape? Had he bribed the agent? Why did this man give no sign of life to Marius, who owed everything to him? His disinterestedness was no less tremendous than his devotion. Why had not that man appeared again? Perhaps he was above compensation, but no one is above gratitude. Was he dead? Who was the man? What sort of a face had he? No one could tell him this.

The coachman answered: “The night was very dark.” Basque and Nicolette, all in a flutter, had looked only at their young master all covered with blood.

The porter, whose candle had lighted the tragic arrival of Marius, had been the only one to take note of the man in question, and this is the description that he gave:

“That man was terrible.”

Marius had the blood-stained clothing which he had worn when he had been brought back to his grandfather preserved, in the hope that it would prove of service in his researches.