In 1794, they experienced another tremendous convulsion, and on the 14th of December, 1797, four-fifths of the city were utterly destroyed, the earth heaving up with loud subterraneous noises; but the people got into the streets in time, and a small number only perished of those who sought for refuge in the churches. Half an hour before this happened, there was a strong sulphureous smell near the castle, and a loud noise under the ground; flames were seen to rise from the banks of the river, and in several other places. These flames are frequently observed near the city on the plains, they do not burn the herbage, and issue from no apparent crevices, the people calling them the soul of the tyrant Aguirra, who took part in a revolt against Ursua, governor of Omaguas, and styled himself "the traitor." He descended the Amazons, and reached the island of Margarita by the rivers of Guiana. Though so continually exposed to this dreadful calamity, the inhabitants of Cumana are in a measure insensible to it, as they imagine that it never occurs but at particular intervals, and that they have always sufficient notice by the state of the weather and other occurrences. The neighbourhood of Cumana is infested with the rattle snake, the coral vipers, centipedes, &c. Farms and country-seats adorn the banks of the Manzanares; at a little distance from the city these are beautifully situated, amid groves of cactus, tamarinds, brazilletoes, the enormous ceiba, palms, &c., and the soil is so rich for pasturage, that excellent milk and butter are produced. Near Cumana the most noted mountains are the Cerro or chain of the Brigantin, about eighteen miles distant, the highest summit of which has a flat top, and is elevated more than 5000 feet above the sea, and the sides of this chain are nearly perpendicular, the country about it being a mere desert. The inhabitants of Cumana attempted to cross these mountains with a road, but found it impracticable, and the passage to the plains of the interior lies over a part of the chain, known by the name of the Imposible, over which a new road is carrying on, the present one being very steep. This chain is continued to the extremity of the gulf of Cariaco, and forms the barrier between it and the ocean. On the peninsula formed by this gulf are the salt works of Araya, which have been successively worked by most of the European nations who possess colonies in the West Indies. The Dutch were however expelled in 1605, when a fort or battery was built to prevent their return, and the mere or lake which these salt-works consist of, was overflowed by the sea in the great hurricane in 1726, which also destroyed the battery; but pits or reservoirs have been since dug, and the sea dyked out, so that great quantities of salt are still procured.