On approaching this pool a hollow moaning sound is heard at intervals, followed in fifteen or eighteen seconds, by an explosion of gas. Five of these detonations happen in about two minutes, frequently accompanied with an ejection of muddy water. These cones are called Los Volcanitos de Turbaco, and are situated about three miles and a half east of the village, at the elevation of more than 160 feet above it. The people say that the plain formerly sent forth flames, but that a priest of great sanctity, succeeded by frequently casting holy water towards it, in extinguishing the fire, after which it became a water volcano. _PROVINCE OF SANTA MARTA._ The province of Santa Marta is divided from that of Carthagena by the great river Magdalena; it is bounded on the north by the Spanish Main, or Caribbean sea; on the east by Maracaybo, and the Rio de la Hacha, on the south by Santa Fé, and west by Carthagena; its extent is about 300 miles, whilst its breadth is only 200. The discovery of this country dates from the third voyage of Columbus in 1497, when he explored the coast of the Spanish Main to Cape Vela. This province was included in the grant made to Alonzo de Ojeda, his patent giving him authority over all the country situated between the Gulf of Darien, and Cape de la Vela, consequently including Darien, Carthagena, Santa Marta, and Maracaybo; these were then designated under the general name of New Andalusia. His predecessor, Rodrigo de Bastidas, was as unfortunate as himself, for in 1524 he was murdered in his bed, by Pedro de Villaforte, one of his companions, because he would not allow his soldiers to plunder a certain Indian town. Pedro de Lugo, and his son Don Alfonso, succeeded Bastidas, but committed such crimes, that their authority soon ended. The first regular system of government on this coast, was that of Pedro Arias de Avila, in 1514, but as no colonies were planted by him in Santa Marta, we must pass to that of Villaforte, which we have just mentioned; and as he proved unsuccessful, to that of Don Ximenes de Quesada, the conqueror of New Granada, who made this province the rallying place of his troops. The climate is not so unhealthy or hot as that of Carthagena; the heat being moderated by the winds, which blow over the cold mountains of the Sierra de Abibe, and the Nevada of Santa Marta, whose summits reach far beyond the lower term of perpetual congelation. The whole country of Santa Marta is full of lofty and impracticable mountains, which form part of the branch of the Caraccas; it produces some cotton, tobacco, palm wine, cacao, Brazil-wood, sugar, vanilla and maize, and a peculiar tree, whose unctuous leaves afford a substance used by the natives, as soap. The mines are of very little importance; some gold is found in the river Ariguana, ninety miles from the capital; and at the village of Ocana copper ores are dug up.