An intriguing reference which some feel may be a form of marbling is located in a compilation concluded in 986 CE entitled ???? (Wen Fang Si Pu) or "Four Treasures in the Scholar's Study" edited via the tenth century scholar-official ??? Su Yijian (957-995 CE). This compilation contains details on inkstick, inkstone, ink brush, and paper in China, which happen to be collectively called the four treasures in the analyze. The text mentions a sort of ornamental paper identified as ??? liu sha jian indicating “drifting-sand” or “flowing-sand notepaper" that was manufactured in exactly what is now the area of Sichuan.