After designed many instruments and a wide variety of scales of wood and rope (escalators and stairs assault), to be used to win in a direct way the walls of a fortress, Leonardo pauses to describe other systems and techniques assault, draw un'atletica human figure which, with coordinated movements, perform a vertical ascent of curtain walls of a building, from the formal structure simplified, making use of their muscle strength and harpoons from implanting in chunks of concrete so fixed, for then Promote the rapid rise of other commilitoni.
C. 1484-86. Ms.. B