For three hundred yards the sea fell back, its bottom was exposed, and the peasants came with carts and carried off the fish left dry upon the strand. The whole of the flat ground between Lake Avernus and the sea had been heaved upwards; but at eight o'clock on the following morning it began to sink again, though not as yet with any violence. It fell apparently at one spot only, and to a depth of about thirteen feet, while from the hollow thus formed there burst out a stream of very cold water, which was investigated cautiously by several persons, some of whom found it by no means cold, but tepid and sulphurous. Ere long those who were examining the new spring perceived that the sunken ground was rising awfully. It was upreared so rapidly that by noon the hollow had become a hill, and as the new slopes swelled and rose where never yet had there been a rising ground, the crest burst and fire broke out from the summit. "About this time," says one Francesco del Nero, who dwelt at Pozzuoli, "about this time fire issued forth and formed the great gulf with such a force, noise, and shining light that I, who was standing in my garden, was seized with great terror. Forty minutes afterwards, though unwell, I got upon a neighbouring height, and by my troth it was a splendid fire, that threw up for a long time much earth and many stones. They fell back again all round the gulf, so that towards the sea they formed a heap in the shape of a crossbow, the bow being a mile and a half and the arrow two-thirds of a mile in dimensions. Towards Pozzuoli it has formed a hill nearly of the height of Monte Morello, and for a distance of seventy miles the earth and trees are covered with ashes. On my own estate I have neither a leaf on the trees nor a blade of grass.... The ashes that fell were soft, sulphurous, and heavy. They not only threw down the trees, but an immense number of birds, hares, and other animals were killed." Amid such throes and pangs Monte Nuovo was born, and the events of that natal day suggest hesitation before we label any crater of the Phlegræan fields with the word "extinct." It is granted that in the course of geologic ages volcanic forces do expend themselves. The British Isles, for instance, contain many dead volcanoes, once at least as formidable as any in the world. But the exhaustion has been the work of countless ages, and many generations of mankind will come and go upon this planet before the coasts of Baiæ and Misenum are as safe as those of Cumberland.