1836 Notebook of Beautifully Inked Geometry Diagrams iron cabin I am not certain

I am not certain

in this case for someone turning 20

but also from what I can tell a rare one

Oil on board and in very good condition

while the other represents Halland

1836 Notebook of Beautifully Inked Geometry Diagrams iron cabin I am not certainAnother from my trip to my favorite antiquarian bookseller in Maine this week, this one a geometry notebook from 1838, which sold me on the first page alone which I might be tempted to extract and frame, though the notebook is thin enough it could just be folded open to show that one and kept in tact. Something so satisfying to my eye about these sorts of geometric diagrams if only everything could be so ordered and rational! 8 1 2" x 6 1 2". Brown