A Chinese ink stone,19th-20th century, of rectangular form, smoothly polished with a recessed inkwell below a flat grinding surface incised with a poem by the Tang poet Du Fu (712-770), reading 'Hui Dang Ling Jue Ding, Yi Lan Zhong Shan Xiao' (Try to ascend the mountain’s crest, it dwarfs all peaks under our feet), a signature below possibly reads Chen Tan, 18.2cm, wood box and cover (3)十九至二十世纪 诗文砚台 连木盒