The persons who witnessed this astonishing catastrophe, assert that flames were seen to issue forth, for an extent of more than half a square league; that fragments of burning rocks were thrown up to prodigious heights; and that, through a thick cloud of ashes, illumined by the volcanic fire, the softened surface of the earth was seen to swell up like an agitated sea. The rivers of Cultamba and San Pedro precipitated themselves into the burning chasms. The decomposition of the water contributed to invigorate the flames, which were distinguishable at a vast distance. Eruptions of mud, and other substances, indicated that subterraneous water had no small share in producing this extraordinary revolution. Thousands of small cones, from six to nine feet in height, called by the Indians "hornitos," or ovens, issued forth from the Malpays. Each small cone is a "fumorola," from which a thick vapour ascends; and in many of them a subterraneous noise is heard, which appears to announce the proximity of a fluid in ebullition. In the midst of the ovens six large masses, elevated from one thousand three hundred to one thousand six hundred and forty feet above the old level of the plains, sprung up from a chasm. The most elevated of these is the great volcano of Jorullo. It is continually burning, and has thrown up an immense quantity of scorified and basaltic lavas, containing fragments of primitive rocks. These great eruptions of the central volcano continued till the month of February, 1760. In the following year they became gradually less frequent. The Indians, frightened at the horrible noises of the new volcano, had abandoned all the villages, within seven or eight leagues of it. They, however, gradually became accustomed to them, and returned to their cottages. So violent were the eruptions of this mountain, that the roofs of houses in Queretaro, though at a distance of more than forty-eight leagues, in a straight line from the scene of explosion, were sometimes covered with ashes. The Mexican _population_ consists of seven races, 1. Individuals born in Europe; 2. Creoles, or Whites of European extraction, born in America; 3. Mesti zos, or descendants of whites and Indians; 4. Mulattoes, descendants of whites and negroes; 5. Zambos, descendants of negroes and Indians; 6. Indians, or the copper-coloured indigenous race; and, 7. African negroes.