《徐霞客游记·浙游日记上》
洞山从龙门完南面曲折地往东延伸过来，山中的石头棱角锋锐，痕印重叠。
余遂同静闻西向蹑山。
The cave mountain came over tortuously from the east of the south gate of Longmen, the stone corners in the mountain were very clear-cut and the lines lined up on top of each other.