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Image 5

Close-up image of the gutter of a book with a pin tucked into it, and dark smudges on both leaves near the head of the pin.

The pin in-situ. Staining of the paper from contact with the metal pin is visible on both adjacent pages. Dante’s Commedia, printed by Vindelino da Spira in Venice in 1477, Credit: Martyna Grzesiak.