The descriptions of the Natural Bridge and Friede's cave, near Rolla, previously referred to as being on page 16 of the same volume, are as follows: "On Clifty Creek found the chert bed of Sec. 21-5 occurring about sixty feet from the top of the Third Magnesian Limestone, with a road passing over its upper surface, presenting it very favorably for observation.
One of them, known as Friede's cave, is six or eight miles Northwest of Rolla, on Cave Spring Creek." "It is said to have been explored for several miles, but I only passed in a few hundred yards. The stalactites here are very beautiful, assuming the structure of satin spar. A very clear stream of water issues out.