The new Harbour of refuge is formed by two immense piers, extending for 1300 feet into the sea, enclosing the old harbour and an area of 20 acres. The width between the piers, and consequently of the harbour is 800 feet, and the average depth of water in it is 20 feet. The old entrance within the piers will be cleared away up to the stone work, so that there will be a spacious basin, large enough to accommodate 600 or 700 vessels. The piers consist of a stupendous timber framework, (creasoted by Bethel’s patent process to keep out the worm,) on each side of the harbour, 14 feet high above the water, and 30 feet in width, filled up with immense blocks of stone from one to six tons in weight; these sides present a solid mass of masonry. As the thousands of tons of stone required have to be brought from a great distance in vessels, and by railway, the filling in goes on slowly. When this work is completed, a platform or flooring of four-inch planking, will be made on the top of each pier. The north pier, after extending straight out east for 700 feet, bends to the south-east for 300 feet, and then bends again to the south for 300 feet more making in all 1300 feet. This pier is intended entirely for business; a double tramway has been laid along it with a large turning table at each bend. The south pier extends from the shore for 1300 feet straight out into the sea, and is intended for a grand promenade. The head of each pier is circular, and 60 feet in diameter; Light-houses have been erected in the centre of the circle at the head of each pier, and at night a brilliant red light is exhibited. The entrance to the harbour between the two piers is towards the south-east; it is 160 feet wide, with a depth of 21 feet at low water. Beyond the south pier a sea wall has been built, with towers of flint and stone, and at the back of it, a broad embankment has been formed for the esplanade, which is a quarter of a mile in length, and 25 feet wide, and affords a splendid view of the sea. The fine Hotel at the northern extremity of the esplanade, presents, in its internal arrangements, a study for the lovers of the curious and the comfortable. Its contiguity to the railway station and the harbour, will cause it to be greatly frequented. The inner harbour has been dredged to a depth of 14 feet in the channel at low water, and this dredging will be extended up to Mutford bridge. A substantial machine has lately been built, for the purpose of excavating the harbour, which, by her powerful aid, will be rendered accessible to vessels of 15 feet draught, at any state of the tide. She is of 200 tons burthen; her engines are of 20 horse power, capable of working in 20 feet of water; she is calculated to raise 1000 tons of soil per day. Her form, engines, and mode of operations, are in accordance with the latest improvements of the age.