At one point in the western side of the island, the native rock itself has been cut into the shape of the wall, and made to take the place of the squared stones for the distance of about ten feet.[442] A moat has also been cut along the entire western side, which, with its glacis, served apparently to protect the wall from the fury of the waves.[443] We know nothing of the internal arrangements of the ancient town beyond the fact of the closeness and loftiness of the houses.

Externally Aradus depended on her possessions upon the mainland both for water and for food.

The barren rock could grow nothing, and was moreover covered with houses.

Such rainwater as fell on the island was carefully collected and stored in tanks and reservoirs,[444] the remains of which are still to be seen.

But the ordinary supply of water for daily consumption was derived in time of peace from the opposite coast.