PFR142701 Inkstone carved as the large mythical Lo-shu tortoise among waves, probably Ming dynasty (grey tuan stone) (underwater) (see also 142695-6) by Chinese School; length: 15 cm; Private Collection; (add.info.: magic kuei toirtoise from Lo River revealed to Yu the Great (rg 2953-2838 BC) the eight trigrams or numerals within the markings of its shell; connected with the origins of Chinese writing; linked to divination and mystical omen readings;); 穢 Paul Freeman; Chinese, out of copyright.