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.