Centuries elapsed before the changes which we now perceive were accomplished. Still they proceeded at a sufficiently rapid rate. Even now the alluvium carried down by the Ticino and the Maggia continually encroaches upon the Lago Maggiore. Seven hundred years ago the village of Gordola stood on the shore of the lake: it is now nearly a mile away from it. The landing-places of Magadino, at the mouth of the Ticino, have to be continually shifted, for the lake retires steadily. Only sixty years ago barges were able to receive their cargoes at a wharf nearly half a mile higher up than the present one. The Gulf of Locarno is gradually being separated from the main sheet of water by alluvial deposits brought down by the Maggia. [Illustration: Fig. 60.—SECTION OF THE NORTHERN PORTION OF LAKE COMO. Scale 1 : 25,000.] [Illustration: Fig. 61.—SECTION OF THE LAKE OF LECCO, NEAR THE BIFURCATION. Scale 1 : 25,000.] [Illustration: Fig. 62.—LONGITUDINAL SECTION OF LAKE COMO. Horizontal scale 1 : 50,000. Vertical scale 1 : 500,000.] The Lario, or Lake of Como, which rivals the Maggiore by its beauty, is likewise being gradually silted up. In the time of the Romans the navigation extended as far as Summolacus (lake-head), the modern Samolaco. But the torrent of Mera gradually converted most of the upper extremity of the lake into an alluvial plain, whilst the alluvial deposits carried down by the Adda cut off the remainder from the main body of water. There now remains only the _Lacus_ {200} _Dimidiatus_, or Lake of Mezzola, which is shrinking from year to year, and will finally disappear altogether. The miasmata rising from the swamps at the mouth of the Adda have frequently depopulated the environs, and the ruined fort of Fuentes, at the mouth of the river, built to defend the Val Tellina, was hardly ever more than a hospital for its fever-stricken garrison. The south-eastern arm of the lake, that of Lecco, through which the Adda makes its escape to the south, has likewise been divided into a series of separate basins. Nature, which would convert these lakes into bottom-lands at no distant date, is being aided here by the works of man. The barrier which obstructed the free egress of the Adda has been cleared away, the structures of fishermen have been removed, and, in consequence of these and other engineering measures, the once-dreaded rises of the lake have been reduced to a minimum, and the southernmost of the lake basins, that of Brivio, has been converted into dry land. The large Lake of Brianza, which extended formerly far to the south-west, has likewise been partially drained, and there now remain only a few lakelets of small extent.