At the time of the siege of 1565 the city or fortress of Malta was situated, not as Valetta now stands on the west, but on the east side of the Marsa or great harbour. To understand even the briefest narrative of one of the most heroic deeds of war that the world has seen, the position of the forts must be understood. (See the Plan.) On the northern coast of the rocky island a bold promontory or rugged tongue of land, Mount Sceberras, separates two deep bights or inlets. The eastern of these was called Marsa Muset, or "Middle Port," but was unoccupied and without defences at the time of the siege, except that the guns of St. Elmo, the fortress at the point of the Sceberras promontory, commanded its mouth. The Marsa Kebir, or simply La Marsa, the "Great Port," was the chief stronghold of the Knights. Here four projecting spits of rock formed smaller harbours on the western side. The outermost promontory, the Pointe des Fourches, separated the Port de la Renelle or La Arenela, from the open sea; Cape Salvador divided the Arenela from the English Harbour; the Burg, the main fortress and capital of the place, with Fort St. Angelo at its point, shot out between the English Harbour and the Harbour of the Galleys; and the Isle of La Sangle, joined by a sandy isthmus to the mainland, and crowned by Fort St. Michael, severed the Galley Harbour from that of La Sangle. All round these inlets high hills dominated the ports. Behind Fort St. Elmo, the Sceberras climbed steeply to a considerable height. Behind the Arenela and English Harbour rose Mount Salvador, Calcara, and further back the Heights of St. Catherine. The Burg and Fort St. Michael were overtopped by the Heights of St. Margaret, whilst the Conradin plateau looked down upon the head of the Marsa and the Harbour of La Sangle. To modern artillery and engineering the siege would have been easy, despite the rocky hardness of the ground, since the Knights had not had time to construct those field-works upon the surrounding heights which were essential to the safety of the forts. Even to the skilled but undeveloped artillery of the Turks, the destruction of Malta ought not to have been either a difficult or lengthy operation, had they begun at the right place.