weight, four and one-third varas in length, and carries a ball of cast iron weighing fourteen libras; one culverin, five and one-half varas in length, weighs one hundred and one quintals one arroba, and carries a cast iron ball weighing seventeen libras; another piece of thirty-five quintals' weight, three varas in length, carries a cast iron ball weighing twelve libras.
The fort at the point has one cannon weighing twenty-five quintals; three small cannon [sacres], weighing twenty-two; and a half-sacre weighing thirteen—the last, with its apparatus, being four varas in length.
The cavalier of the beach has a piece, extra thick and strong at the breech, of forty quintals' weight which carries a ball weighing fifteen libras; and one half-sacre, of thirteen quintals' weight.
At the river there is a large swivel-gun with cross-bars, weighing thirty quintals; one cannon weighing twenty-six quintals, one sacre weighing twenty-two quintals, four half-sacres weighing thirteen or fourteen quintals, and two esmeriles [a small piece of ordnance] weighing four or five quintals.
For the stone fort to be provided with artillery according to its plan and embrasures, it is necessary to have twenty-five pieces, three of them heavy, and twelve sacres and half-sacres.
The cavalier of the beach needs five pieces, two of them heavy, and three sacres.
That at the point of the sea and the river needs six pieces—some sacres, and two swivel-guns.
For the service of the ships and galleys there are needed four cannon, six swivel-guns, six sacres, six half-sacres, and some small culverins. Thus sixty pieces in all are necessary to provide the city well
