Plan of a Fortress with Wall and Ditch Measures
A bastioned fort plan and a scheme for excavating its ditch
The main drawing is a square fortress plan with rounded corner bastions, annotated with its principal measures: sides of 151 paces and 150 braccia, with a figure of 42. The wall is noted as 15 feet thick at the base and 13 at the top, and the ditch as 42 braccia wide at the bottom, 50 at the mouth, and 20 deep, holding 4 braccia of water. A separate scheme, written upside down, treats the excavation of a ditch, and a faint earthwork or landscape is sketched below.
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Plan of a fortress with wall and ditch dimensions
A square fort with rounded corner bastions is laid out and dimensioned: sides of 151 paces and 150 braccia, with a 42 figure. The wall measures 15 feet thick at the base and 13 at the top; the surrounding ditch is 42 braccia wide at the bottom, 50 at the mouth and 20 deep, carrying 4 braccia of water.
Scheme for excavating a ditch
A separate scheme, written upside down, is captioned as the excavation of a ditch and the digging out of earth. It pairs the fortification plan with the earth-moving work needed to sink its moat.