《徐霞客游记·滇游日记二十四》
岛北有一道迂回的山冈，四尺高，十多丈长，东端突起如昂首，是蛇石。
北有一回冈，高四尺，长十余丈，东突而昂其首，则蛇石也。
To the north of the island is a serpentine ridge of peaks, ten feet high and a dozen rods long. The eastern end rises high, its head lifted; it is the serpent stone.