“In some parts the water is brackish, and lies lower than the sea: in others it oozes full of tartar from beds of travertine. At the bottom or on the sides of hills are a multitude of hot springs, which form pools, called Lagoni . A few of these are said to produce borax: some, which are called fumache , exhale sulphur; others, called bulicami , 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.