Sketches of fortifications
Vaulted arches above hatched piers, drawn upside down
The leaf carries rapid pen sketches the caption identifies as fortifications, drawn with the sheet inverted. The upper group shows arched, vaulted forms with converging supports, while the lower group presents a row of hatched piers or casemate-like bays set within a rectangular frame. No text was transcribed for this page, so the reading rests on the drawings alone.
On this page
Fortification structures in section
The lower sketch sets a series of shaded, rounded piers within a bounding frame, suggesting the hatched masses of a fortified work seen in section. The caption names the page as fortifications.
Vaulted and arched forms
The upper group draws arched, vaulted structures with braces converging toward a central point, studying how the spans are carried. The forms are sketched loosely in pen.