There was a Charonion at Hierapolis, an account of which we get from Apulæus and Dio Cassius. It was deep. From the orifice, which was surrounded by a balustrade, escaped so dense a vapour that animals held in it died, and men who inhaled it were stupefied. The priests who ministered to the oracle professed to be immune, but Strabo tells us that they simply held their breath when they stooped over the fumes. He who desired to consult the oracle was for a while placed on a platform above the opening.
On the flank of Mount Citheron was a cave dedicated to the Nymphs. Those who desired to inquire of them entered the grotto, when it was supposed that the Nymphs inspired them with a knowledge of the future; and such persons were entitled Nympholeptes. The corresponding expression among the Latins was lymphatici, expressive of the pale and exhausted condition in which they were when they issued from the cave. Eusebius, Bishop of Cæsarea says: "There are exhalations that produce drowsiness and procure visions;" and Apulæus says: "Due to the religious fury they inspire, men remain without eating or drinking, and some become prophets and reveal future things."
Apollo was the god of prophecy above all others. He was born at Delos, according to the poets; and it is there that the Homeric poems say was one of his most ancient sanctuaries. Thence, doubtless, issued the twenty famous oracles at the epoch of the colonisation. At Delphi the priestess was seated on a tripod over a crack in the rock, from which exhaled mephitic vapours that rendered her delirious, and her incoherent exclamations were reduced into hexameters by the attendant priests. But there was also at Delos the Manteion, the prophetic grotto. This has of late years been discovered along with the foundations of the temple. The Manteion is a gallery, naturally bored in the rock. The winds that penetrate it cause strange pipings and hollow moans, that served as an accompaniment to the oracles. But the most remarkable of these caverns was that of Trophonios in Beotia. Pausanius tells us the legend of its origin. The Beotians had suffered from drought for two years and sent to consult the oracle of Delphi. The reply received was that they must refer themselves to Trophonios at home. But who was the party? The Beotians had never heard of him. Then the oldest of their deputies recalled having once pursued a swarm of bees and followed it till it disappeared in a cave. That doubtless was the spot, and there, after the offering of sacrifices, Trophonios obligingly showed himself, and explained who he was and what were his powers. Since that time his oracle was much consulted, and happily an account of how he, or his priests, befooled visitors to the cave has been given us by Pausanius from his personal experience.
Those who wished to consult the oracle had first to purify themselves by spending some days in the sanctuary of the Guardian Spirit and of Fortune, to abstain from warm baths, but to bathe in the river Hercynia; they might eat as much as they liked of the meat offered in sacrifice. "You are conducted during the night to the river, where you are bathed and rubbed with oil by two boys of the age of thirteen. Then the priests take possession of you, and you are conducted to two fountains side by side. You drink of one, that of Oblivion, so as to disengage your thoughts from what is past, then that of Remembrance, to assure your recollecting what is about to take place. After having addressed your prayers to a statue, you go to the oracle, dressed in a linen tunic girded below the breast, and booted in the fashion of the country. The oracle is on the mountain above the sacred grove. It is surrounded by a marble wall, about the height of your waist. On this wall are planted twigs of copper linked together by copper filaments, and the gates are in this grating. Within this enclosure is a chasm, not natural, but excavated with a good deal of art and regularity, in form like a baker's oven. There is no ladder there for descent into the cave, and one is brought, that is light and narrow. Once at the bottom you see on one side, between the ground and the masonry, a hole about large enough for a man to squeeze through. One lies on the back, and holding in one hand a honey-cake, thrust the feet in at the opening, and then work oneself till the legs are in up to the knees. Then, all at once, the rest of the body is dragged down with force and rapidity, just as if you were swept forward by an eddy in a river.
"Once arrived in the secret place, all do not learn the future in the same manner. Some see what is to befall them unrolled in vision, others hear it by the ear. Then you ascend by the same opening whereby you descended, going feet foremost. No one, it is said, has died in the cave, with the exception of one of the guardsmen of Demetrius, and he went down, not to consult the god, but in hopes of plundering the sanctuary of its gold and silver; his carcase, they say, was not ejected by the orifice that is sacred, but was found in another spot. On issuing from the cave of Trophonios the priests lay hold of you, and after having planted you on the seat of Remembrance, question you as to what you have seen and heard. When you have told them, they hand you over, overwhelmed with fear, and unrecognisable by yourself and others, to other ministers who convey you to the edifice dedicated to the Good Genius and to Fortune."
Those issuing from the cave for long after remained dejected, pale, and melancholy. Pausanius says that after a while one who had gone through the ordeal could laugh; but Suidas tells us that those who returned from having made the descent never smiled again, and this gave occasion to a saying relative to a preternaturally grave personage, "He has consulted the oracle of Trophonios."
Plutarch gives us some further particulars. The description made by one of the characters he introduces speaks of visions caught by inhaling a stupefying gas. Under its influence hallucinations were produced in which Trophonios himself was thought to appear, and the tortures of Tartarus were revealed. On emerging from the cave into fresh air, the questioner fell into fits of delirium, and thought he still saw strange visions. In the biography of Apollonios of Tyana, Philostratus tells us that the sage and wonder-worker was very desirous to penetrate into the cave, but that the priest raised objections and made difficulties, till at last his patience failed and he entered by main force and remained within seven days. So much in this semi-fictitious biography is true perhaps—that this hero did force his way in. It is also true that he had sufficient discretion not to tell what he had discovered of the tricks there perpetrated.
There was another of these caves at Acharaca, near Nysa, on the road to Tralles. The gas there exhaled had a medical healing virtue, and also gave occasion to the delivery of oracles. Persons suffering from an illness and placing confidence in the power of the gods, travelled thither and stayed some time with the priests, who lived near the cave. Those ministers of the gods then entered the cavern and spent a night in it. After that they prescribed to their patients the remedies revealed to them in their dreams. Often, however, they took their patients along with them into the cave, where they were expected to remain for several days fasting and falling into prophetic sleep.
About four centuries before the Christian era, there existed at Rome a temple dedicated to Jupiter Capitolinus, by the Tarquins, and beneath it was a subterranean chamber in which were preserved a collection of ancient oracles, the keeping of which was confided to his officers, the duumviri, and the penalty of death attached to the divulgation unlicensed, of their contents.
According to the legend, a strange woman, the sibyl of Cumæ, brought to Tarquin the old nine books of oracles, and demanded for them three hundred pieces of gold. The king considered the price exorbitant, scoffed at the woman, and refused to buy. Thereupon the sibyl cast three of the volumes into the fire, and demanded the same sum precisely for the remaining six. Tarquin again declined to purchase. She then burnt three more, but still required for the remainder the original price. The king now thought that he had acted unwisely, and hastened to conclude the bargain and secure the oracles that contained prophecies relative to the destiny of the Roman people.