“龟头”一词在苏轼笔下凡两见。其一,见于其在黄州（今湖北黄冈市）所作的《书赠古氏》（1082年）一文:“今年秋冬,当作三间一龟头,取雪堂规模,东荫修竹,西眺江山。”这是苏轼第一次使用“龟头”。其二,见于其在儋耳（今海南儋州市）所作《与郑靖老书》（约1098年）:“近买地起屋,五间一龟 The word “glans” is seen in both works by Su Shi. First, see in his Huangzhou (now Hubei Huanggang City) made a book entitled “Ancient Book” (1082) article: “This fall and winter, as a glance, take the size of the snow hall, the East shade Xiuzhu, West Overlooking the country. ”This is the first time Su Shi use“ glans. ” Second, seen in its ear (now Hainan Zhuozhou City) made “and Zheng Jing old book” (about 1098): "near the ground to buy a house, a turtle