been carved by the hand of man, and yet all of them have been produced by the dripping of water from the gypsum rock. The cavern is not destitute of inhabitants. Huge crickets and spiders of an almost white colour crawl along over the ground, and rats as big as leverets run by, exhibiting sharp teeth and long tails. Another cavern is called "Martha's Vineyard." It appears as if a vine had climbed up the sides and spread its branches over the roof, from which hang suspended what look like clusters of grapes, but all of the same stony nature. In another cave it seems to the visitor that he is standing in a wintry scene, ice above and ice on the ground, with here and there patches of snow, the appearance being caused by the excessive whiteness of the gypsum. Farther on, there is a beautiful grotto, called "Serena's Arbour," the walls of which are covered with a drapery resembling yellow satin, falling in graceful folds, while through it murmurs a rivulet, which makes its way to one of the many rivers running through the cavern. In another, on the torches being extinguished it appears as if stars innumerable were glittering in the sky. On a stone being thrown upwards, it quickly strikes the roof, and it is soon seen that these seeming stars are produced by pieces of mica embedded in the roof, on which the light of a lantern being thrown in a peculiar way is brightly reflected. Although the caverns seem to be of immense height, the ceiling in most parts is not more than thirty feet from the ground. In the centre of one cavern, a regular hill rises from the ground, with a stream running at its base. Several rivers are crossed in this vast cavern, one is called the Echo River, another the Styx, and a third the Lethe. They are inhabited by fish and crawfish, sightless and perfectly white. This vast cavern, the ramifications of which are said to measure nine miles, was not known to white men until 1802. For many years no one advanced beyond three miles from the entrance, further progress being stopped by a deep cavern called the "Bottomless Pit," 1000 feet deep. At length, however, a daring guide threw a ladder over it, and crossing by this means, he was able to explore six more miles of this subterranean region. A bridge has now been constructed by which people can pass over in perfect safety. It is said that no dog will willingly enter the cavern; indeed, few persons can pass along its passages without a sensation of awe, although with a guide it may be traversed without danger. CHAPTER NINE. SILVER MINES, ETCETERA.