On the east coast there is a long stretch of low-lying land between the mountains and the sea. This is the most unhealthy part of the island, a mixture of swamps and lagoons, where deadly fevers have their home. It is only in winter and spring that life is possible on the eastern plain. In the spring the plain is exceedingly beautiful, decked with flowers and bright with verdure. On one side rolls the bluest of seas, crested with the whitest of foam. As you stand by the shore, and watch the great waves dashing themselves to pieces on the breakers or rippling caressingly over the tawny sands, it is almost impossible to believe that this smiling region is, during the hot weather, one of the unhealthiest places in Europe. About July or August the peasants lock up their houses, pack their carts with poultry, provisions, and children, and go up 3,000 feet into the mountains, to escape the fevers that come with the hot weather. Houses are shuttered and barred, fields and vineyards are left untended, and the peasants simply run away as fast as they can from a land where merely to sleep means death. The French Government is doing its best to improve the condition of things by planting groves of eucalyptus-trees in the most unhealthy places. The eastern plain is broken here and there by a number of lagoons or shallow lakes, separated from the sea by long narrow sand-banks. These lagoons swarm with fish and cockles. One of them is known as the Lake of Diana. It is a great sheet of salt water, with one narrow opening to the sea. It contains a small island, 460 yards in circumference, which is made up entirely of oyster-shells, covered, however, with grass, shrubs, and trees. The island is built in the shallowest part of the lagoon, and dates from the time when Aleria used to send large supplies of salted oysters to the people of Rome. The sharp piece projecting from the north of Corsica is called the Cap. It is only from eight to ten miles wide. Through it runs a range of mountains between 3,000 and 4,000 feet high, which lies nearer the west coast than the east, and has short narrow valleys running down to the eastern coast. The people of this part of Corsica are noted for being more peaceful and law-abiding than those in the other parts of the island.