The whole affair lasted only a few seconds, and calm was re-established in Nature as suddenly as it had been disturbed. Conversation, of course, then turned upon the phenomenon just witnessed, and the natives maintained that atmospheric disturbances of this kind are the forerunners of severe earthquakes or violent volcanic eruptions; some of them declaring that a disaster of this character had doubtless just occurred somewhere. The host, an elderly man much esteemed in the district for his knowledge, went on to describe many such catastrophes which he himself had witnessed. He spoke more particularly of the eruption of the volcano of Coseguina, in Nicaragua, which had been preceded by a fierce whirlwind, which had been so strong that it carried pieces of rock and ashes to a distance of nearly a mile. The captain of a large sailing vessel had told him that upon the following day, when more than 100 miles from the coast, he had found the sea covered with pumice-stone, and had experienced great difficulty in threading a way for his vessel through these blocks of volcanic stone which were floating upon the surface like icebergs. Everyone, including the European, had his story to tell, and while the party were still in conversation, a terrible noise like thunder was heard, and the earth began to quake. At first the shocks were felt to be rising upward, but after a few seconds they became transformed into undulations traveling northward, just as the sudden whirlwind had done. The soil undulated like the surface of a stormy sea, and the trees were rocked to and fro so violently that the topmost branches of the palms came in contact with the ground and snapped off. The traveler and his friends, believing themselves to be out of danger, were able to follow with ever-increasing interest the rapid phases of the disturbance, when a strange and alarming phenomenon attracted their notice. "Our attention was called," relates Herr Heine, "to a terrible commotion in the direction of the lagoon, but I cannot express what I then saw, I did not know if I was awake or a prey to a nightmare; whether I was in the world of reality or in the world of spirits."