The Gulf of Santorin, in the Grecian Archipelago, has been for two thousand years a scene of active volcanic operations. Pliny informs us that in the year 186 B.C. the island of "Old Kaimeni," or the Sacred Isle, was lifted up from the sea; and in A.D. 19 the island of "Thia" (the Divine) made its appearance. In A.D. 1573 another island was created, called "the small sunburnt island." In 1848 a volcanic convulsion of three months' duration created a great shoal; an earthquake destroyed many houses in Thera, and the sulphur and hydrogen issuing from the sea killed 50 persons and 1000 domestic animals. A recent examination of these islands shows that the whole mass of Santorin has sunk, since its projection from the sea, over 1200 feet. The fort and village of Sindree, on the eastern arm of the Indus, above Luckput, was submerged in 1819 by an earthquake, together with a tract of country 2000 square miles in extent. "In 1828 Sir A. Burnes went in a boat to the ruins of Sindree, where a single remaining tower was seen in the midst of a wide expanse of sea. The tops of the ruined walls still rose two or three feet above the level of the water; and, standing on one of these, he could behold nothing in the horizon but water, except in one direction, where a blue streak of land to the north indicated the Ullah Bund. This scene," says Lyell ("Principles of Geology," p. 462), "presents to the imagination a lively picture of the revolutions now in progress on the earth--a waste of waters where a few years before all was land, and the only land visible consisting of ground uplifted by a recent earthquake." We give from Lyell's great work the following curious pictures of the appearance of the Fort of Sindree before and after the inundation. FORT OF SINDEE, ON THE EASTERN BRANCH OF THE INDUS, BEFORE IT WAS SUBMERGED BY THE EARTHQUAKE OF 1819.