The city lay in a recess of a great gulf and was in the form of a peninsula. It was separated from the mainland by an isthmus about three miles in width. From this isthmus a narrow and longish tongue of land, about 300 feet wide, extended toward the west between a lake and the sea. On the sea side the city was protected by a single wall. Toward the south and the mainland, where the citadel of Byrsa stood on the isthmus, there was a triple wall. The height of each wall was forty-five feet without counting parapets and towers, which were separated from each other by a space of 200 feet, and each was divided into four stories. The depth was thirty feet. Each wall was divided vertically by two vaults, one above the other. In the lower space there were stables for 300 elephants, and alongside were receptacles for their food. Above were stables for 4000 horses and places for their fodder and grain. There were barracks also for soldiers, 20,000 foot and 4000 horse. Such preparation for war was arranged and provided for in their walls alone. The angle which ran around from this wall to the harbor along the tongue of land mentioned above was the only weak and low spot in the fortifications, having been neglected from the beginning.
						 The harbors had communication with each other, and a common entrance from the sea seventy feet wide, which could be closed with iron chains. The first port was for merchant vessels, and here were collected all kinds of ships' tackle. Within the second port was an island which, together with the port itself, was enclosed by high embankments. These embankments were full of shipyards which had capacity for 220 vessels. Above them were magazines for their tackle and furniture. Two Ionic columns stood in front of each dock, giving the appearance of a continuous portico to both the harbor and the island. On the island was built the admiral's house, from which the trumpeter gave signals, the herald delivered orders, and the admiral himself overlooked everything. The island lay near the entrance to the harbor and rose to a considerable height, so that the admiral could observe what was going on at sea, while those who were approaching by water could not get any clear view of what took place within. Not even the incoming merchants could see the docks, for a double wall enclosed them, and there were gates by which merchant ships could pass from the first port to the city without traversing the dockyards. Such was the appearance of Carthage at that time.