An agate snuff bottle, Yijinzhai Mark, Qing dynasty, Qianlong - Jiaqing period | 清乾隆至嘉慶 瑪瑙素面直筒式鼻煙壺 《詒晉齋》款

Yijinzhai, hall name of Yong Xin (1752-1823) or Prince Cheng, the 11th son of the Qianlong Emperor, one of the four most accomplished calligraphers of his time; the other three were Weng Fanggang (1733-1818), Liu Yong (1797-1805) and Tie Bao (1752-1824). He was also an important calligraphy collector in the Qing court, and he published a selection from his collection, Yijinzhai tie [A selection of master calligraphies from the Yijinzhai Collection), in the 10th year of Jiaqing (1805), by the order of his brother, Jiaqing Emperor.

詒晉齋，永瑆齋號。永瑆（1752-1823年），號幼庵，乾隆第十一子，封成親王，乾嘉時期四大書家之一，亦是有清一代重要歷代書畫金石藏家，嘉慶帝令擇齋中收藏歷代法書精者，勒石上墻並拓印出版成《詒晉齋帖》。