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A faint technical diagram, likely from a 17th-century treatise on perspective, fencing, or geometry. The central feature is a large V-shaped construction of lines. To the right, a faint human figure in period dress stands in a specific posture. On the left side of the diagram, a vertical series of capital letters serves as labels for various horizontal points or planes.
...?
A
...?
D
E
F
G
H
...?