
Unknown artist
Fortress building, design of fortifications, Joseph Henry, circa 1790. Feather/paper. 42.1 x 26.4 cm. Bez: "Projecte par le Major Francke, dessine par Henry, Bas-Officier du Corps des:“Scales with unit of measurement” Tois: “und” Maß" (200 toises = 7.2 cm; 800 step or Ellen = 8.7 cm).
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