, boil with a mephitic gas. The very air above is only a pool of vapors, which sometimes undulate, but seldom flow off. It draws corruption from a rank, unshorn, rotting vegetation, from reptiles and fish both living and dead.

“All nature conspires to drive man away from this fatal region; but man will ever return to his bane, if it be well baited. The Casentine peasants still migrate hither in the winter to feed their cattle: and here they sow corn, make charcoal, saw wood, cut hoops, and peel cork. When summer returns they decamp, but often too late; for many leave their corpses on the road, or bring home the Maremmian disease.”