1846 - Erb, Leo. *Die Quadratur des Vierecks*. 10 embossed prints. Each consists of a double-page spread folded down the center, with typographic text on the left-hand side, printed on vellum. Each embossed print is signed in the lower right corner, signed by the artist and the poet Gerhard Weber in the colophon, numbered on the back of the title page, and bears a dedication by Leo Erb on the inside right panel of the case. 1990. Copy: 26/50. Sheet dimensions: 40 × 40 cm. Unfolded: 40 × 80 cm. — Includes the title page, loose inside the original slipcase; the slipcase is slightly rubbed and soiled, with the corners partially and lightly bumped; the spine bears the handwritten inscription “ERB.”

Erb, Leo. *Die Quadratur des Vierecks*. 10 embossed prints. Each consists of a double-page spread folded down the center, with typographic text on the left-hand side, printed on vellum. Each embossed print is signed in the lower right corner, signed by the artist and the poet Gerhard Weber in the colophon, numbered on the back of the title page, and bears a dedication by Leo Erb on the inside right panel of the case. 1990. Copy: 26/50. Sheet dimensions: 40 × 40 cm. Unfolded: 40 × 80 cm. — Includes the title page, loose inside the original slipcase; the slipcase is slightly rubbed and soiled, with the corners partially and lightly bumped; the spine bears the handwritten inscription “ERB.” Published by London, Annely Juda Fine Art, 1990. - One double-page spread has a very small waterstain on the right margin; the reverse side of the last double-page spread has some light pencil marks from the dedication text inside the case, the dedication inscription is somewhat smudged; the title page has some scuffing and a small tear (0.5 cm) in the upper right corner of the inside page.