I could observe these strange walls quite closely: our sounding lines indicated that they dropped perpendicularly for more than 300 meters, and our electric beams made the bright limestone positively sparkle.
Pude observar de cerca aquellas curiosas murallas verticales, ya que la sonda indicaba más de trescientos metros de profundidad, y nuestros focos eléctricos arrancaban resplandores de aquella brillante masa calcárea.