A RARE BAMBOO AND BOXWOOD WRITING SET QING DYNASTY (1644-1911) Comprising: two horn-mounted bamboo brushes, each inscribed, one with seals reading ‘Li’ and ‘Shi Shang’, the other reading ‘Zhen’ and ‘Zhu Shi’; a horn-mounted brush case, inscribed and dated xinchou year, signed ‘Du Fu’, with seals reading ‘Chen’ and ‘Du Fu’; and a boxwood case with a poetic inscription, signed ‘Shi Xiang’, with one seal reading ‘Yun yin’. The brush case: 8 7/8 in. (22.5 cm.) long, box