License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Yashima Gakutei. The Chinese Calligrapher Boying (Japanese: Hakuei; also known as the “Sage of Cursive Script”); “Inkstone” (Suzuri), from Four Friends of the Writing Table for the Ichiyō Poetry Circle (Ichiyō-ren Bunbō shiyū)
From the Spring Rain Collection (Harusame shū), vol. 1, ca. 1827. The Metropolitan Museum of Art.