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At the salient of the bastion there is a mortar battery under the rampart, and a casemated traverse for howitzers upon the terreplein.

They had now demolished all of the wall that rose above the terreplein, and talked of making a general assault.

But the remaining side, toward the land, has some heights; and the ground is such that a trench can be opened up to the wall, which has no terreplein.

In fortification, a bastion of which the terreplein or interior terrace is not continued beyond a certain distance to the rear of the parapet, and thus leaves a central area at a lower level.

The latter has no terreplein, and is seven palmos in height.