《太平广记·卷四百·宝一》
进入山下一丈，有银；再进入一丈，有锡；再进入一丈，有铅；再进入一丈，有丹阳铜。
入山下一丈，有银；又入一丈，有锡；又入一丈，有铅；又入一丈，有丹阳铜。
Entering one zhang into the mountain, there was silver; entering another zhang, there was tin; then, lead; and further entering another zhang, there was Danyang copper.