The three Books Of the fifth part which the Catholic King Philip the second ordered his chief engineer Juanelo to write and explain
Consecrated to his Catholic Majesty by the hand of his majordomo Juan Gómez de Mora.
FIFTH VoLUME
The Nineteenth Book deals with constructions in the sea: how they are to be built and fitted out in various ways.
The Twentieth Book deals with making defences for ports so that fleets can not enter
The Twenty-First Book deals with divisions of water, as well as islands and other things concerning water
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