without eyes; at least, they have been subjected to
a careful scientific examination, and no organ similar to an eye can be
discovered. It would indeed be a useless appendage to creatures that
dwell for ever in Cimmerian darkness. But, as usual, the acuteness of
one sense is increased by the absence of another. These fish are
undisturbed by the most powerful glare of light, but they are alarmed at
the slightest agitation of the water; and it is therefore exceedingly
difficult to catch them.

The rivers of Mammoth Cave were never crossed till 1840. Great efforts
have been made to discover whence they come, and whither they go. But
though the courageous Stephen has floated for hours up to his chin, and
forced his way through the narrowest apertures under the dark waves, so
as to leave merely his head a breathing space, yet they still remain as
much a mystery as ever--without beginning or end, like eternity. They
disappear under arches, which, even at the lowest stage of the water,
are under the surface of it. From an unknown cause, it sometimes happens
in the neighborhood of these streams, that the figure of a distant
companion will apparently loom up, to the height of ten or twelve feet,
as he approaches you. This occasional phenomenon is somewhat frightful,
even to the most rational observer, occurring as it does in a region so
naturally associated with giants and genii.

From the Jordan, through Silliman's Avenue, you enter a high, narrow
defile, or pass, in a portion of which, called the Hanging Rocks, huge
masses of stone hang suspended over your head. At the side of this
defile, is a recess, called the Devil's Blacksmith's Shop. It contains a
rock shaped like an anvil, with a small inky current running near it,
and quantities of coarse stalagmite scattered about, precisely like
blacksmith's cinders, called slag. In another place, you pass a square
rock, covered with beautiful dog's tooth spar, called the Mile Stone.

This pass brings you into Wellington's Gallery, which tapers off to a
narrow point, apparently the end of the cave in this direction. But a
ladder is placed on one side by which you ascend to a small cleft in the
rock, through which you are at once ushered into a vast apartment,
discovered about two years ago. This is the commencement of Cleveland's
Avenue, the crowning wonder and glory of this subterranean world. At the
head of the ladder, you find yourself surrounded by overhanging
stalactites, in