Of nearly the same character as the Mountain Demons, and possessing even more features of the Demons of Barrenness, are the monsters guarding rocky passes. They are distributed through land, sea, and rivers. The famous rocks between Italy and Sicily bore the names of dangerous monsters, Scylla and Charybdis, which have now become proverbial expressions for alternative perils besetting any enterprise. According to Homer, Scylla was a kind of canine monster with six long necks, the mouths paved each with three rows of sharp teeth; while Charybdis, sitting under her fig-tree, daily swallowed the waters and vomited them up again. [148] Distantly related to these fabulous monsters, probably, are many of the old notions of ordeals undergone between rocks standing close together, or sometimes through holes in rocks, of which examples are found in Great Britain. An ordeal of this kind exists at Pera, where the holy well is reached through a narrow slit. Visitors going there recently on New Year's Day were warned by the dervish in charge--'Look through it at the water if you please, but do not essay to enter unless your consciences are completely free from sin, for as sure as you try to pass through with a taint upon your soul, you will be gripped by the rock and held there for ever.' [149] The 'Bocca della Verità'--a great stone face like a huge millstone--stands in the portico of the church S. Maria in Cosmedin at Rome, and its legend is that a suspected person was required to place his hand through the open mouth; if he swore falsely it would bite off the hand--the explanation now given being that a swordsman was concealed behind to make good the judicial shrewdness of the stone in case the oath were displeasing to the authorities. The myth of Scylla, which relates that she was a beautiful maiden, beloved by Glaucus, whom Circe through jealousy transformed to a monster by throwing magic herbs into the well where she was wont to bathe, is recalled by various European legends. In Thuringia, on the road to Oberhof, stands the Red Stone, with its rosebush, and a stream issuing from beneath it, where a beautiful maid is imprisoned. Every seven years she may be seen bathing in the stream. On one occasion a peasant passing by heard a sneeze in the rock, and called out, 'God help thee!' The sneeze and the benediction were repeated, until at the seventh time the man cried, 'Oh, thou cursed witch, deceive not honest people!' As he then walked off, a wailing voice came out of the stone, 'Oh, hadst thou but only wished the last time that God would help me. He would have helped me, and thou wouldst have delivered me; now I must tarry till the Day of Judgment!' The voice once cried out to a wedding procession passing by the stone, 'To-day wed, next year dead;' and the bride having died a year after, wedding processions dread the spot.