The cave leading westward is easiest of access and contains a number of spacious chambers. The room is about seventy feet square and fifty feet from the floor to the ceiling. The floor is obstructed with huge boulders. The darkness and stillness are intense. Picnic parties sometimes go there, and, with a huge boulder for a table, eat their lunch in the glare of torches that cast uncanny shadows along the massive walls. Timid persons hesitate in venturing into the depths of the eastern cave. The passage slants downward at an angle that compels the explorer to crawl and slip and slide for nearly 100 feet before reaching a spot where a person may stand upright and walk safely. From the darkness echoes the sound of rushing water, which later is found to be a stream that runs from eight to thirty feet in width, and from six inches to many feet in depth. Men have waded in the stream until the water reached their chins, and then gone in a boat to points where they were unable to touch bottom with the longest oars. A farmer carried his boat into the cave several years ago to follow the stream to its end. At a depth estimated to be 200 feet below the surface of the ground is a natural bridge, formed by a huge stone that fell across the stream. The water plunges underneath this bridge like a millrace. A boat can be pulled over the bridge, however, and launched on the other side. About 100 feet below the bridge the stream widens into a broad, deep pool, with a high, vaulted roof. Beautiful stalagmites and stalactites adorn this chamber. Two hundred feet below this pool the passage is difficult. It is claimed that this cave has been explored for a mile. The stream is believed to find its outlet at a spring about three miles from the entrance to the caves. This spring is of great size and volume, and flows with remarkable swiftness. In rainy seasons the spring boils and gushes as if choked with the flood of water that pours from its mouth. The stream in Black Prairie cave rises when there is a heavy rainfall in the surrounding country, and the increased flow of both springs and stream at such times is taken as evidence that they are connected. ARTESIAN WATERS IN TEXAS.