The goblin was developed under the fetid covering of the Mouffetard sewer; the corpses of the Marmousets had been cast into the sewer de la Barillerie; Fagon attributed the redoubtable malignant fever of 1685 to the great hiatus of the sewer of the Marais, which remained yawning until 1833 in the Rue Saint-Louis, almost opposite the sign of the Gallant Messenger. The mouth of the sewer of the Rue de la Mortellerie was celebrated for the pestilences which had their source there; with its grating of iron, with points simulating a row of teeth, it was like a dragon’s maw in that fatal street, breathing forth hell upon men. The popular imagination seasoned the sombre Parisian sink with some indescribably hideous intermixture of the infinite. The sewer had no bottom. The sewer was the lower world. The idea of exploring these leprous regions did not even occur to the police. To try that unknown thing, to cast the plummet into that shadow, to set out on a voyage of discovery in that abyss⁠—who would have dared? It was alarming. Nevertheless, someone did present himself. The cesspool had its Christopher Columbus.