This description of oracles abounded throughout Greece; the most memorable of which was that on the Asiatic coast, between Trattis and Nyssa, which is more particularly described by Strabo than any other. Not far from the town of Nyssa, says he, there is a place called Charaka, where we find a grove and temple sacred to Pluto and Proserpine, and close to the grove a subterraneous cave, of a most extraordinary nature. It is related of it, that diseased persons, who have faith in the remedies predicted by those deities, are accustomed to resort to it and pass some time with experienced priests, who reside near the cave. These priests lay themselves down to sleep in the cave, and afterwards order such medicine as have been revealed to them there, to be furnished to their patients in the temple. They frequently conduct the sick themselves into the cave, where they remain for several days together, without touching a morsel of food; nor are the profane withheld from a participation in the divinatory sleep, though this is not permitted otherwise than under the controul, and with the sacred sanction, of the priests. There is, however, nothing more surprising about this place than that it is esteemed noxious and fatal to the healthy.[104] This last remark of our geographer, proves how jealous the priestly physicians were of their medical monopoly, and how fearful lest the saner part of mankind should detect and expose the pretended virtues of their medical sanctuary.

We have hitherto mentioned the name of Aesculapius but casually, though there was no god of antiquity more celebrated for curing every species of malady by the incubatory process. He was particularly designated by the Greeks as "the sender of dreams," [Greek: Oneiropompon]; nor could any other deity boast of so great a number of those oracles. The most distinguished of these was the oracle of Epidaurus, in the Argivian territory; from which spot his worship extended over a great proportion of the old world;—hither, as being the place of his birth and the site of his richest temple, crowds of sick persons constantly repaired in quest of dreams. The success attending them was diligently set forth on every wall of the temple; where the tabulae votivae recorded the names of those who had been healed, the nature of their maladies, and the cure which the god prescribed. Similar circumstances are related of his Temple at Triccae, in Thessaly, where Esculapius was held in great veneration at a very early period; there appears also to have been another such temple either at or near Athens,[105] where we must look for the scene of the ridiculous cure which Aristophanes makes Aesculapius to perform on the blind god of riches. Though there is undoubtedly a rich vein of the burlesque in the Plutus of the Grecian dramatist, yet we may gather much concerning our present subject from the scene in which the slave, who had attended Plutus in the Temple, relates the whole process of his master's wife. Here also the night was the chosen period of incubation. Before the signal for sleep was given, the officiants of the temple extinguished all the lights in the sick men's chamber; thus involving them in a solemn stillness and obscurity highly favourable to the work in hand, but in a particular manner to the subterfuge of the priests, who enacted the nocturnal apparition of Aesculapius to his sick client.

This passage in Plutus is certainly the earliest circumstantial relation we possess of the practice of this species of incubation.[106] The license permitted to Grecian comedy was such as to authorise the ridicule and contempt of the most popular deities; we are not, therefore to conclude from the scenes that there were many unbelievers, or that this ancient system of cure had sunk into disrepute: for the history of our comedian's great contemporary, Hippocrates, informs us, that at this very time the temple of Aesculapius at Cos abounded in tablets, on which the sick attested the remedies that had been revealed to them during incubation, and that he himself was highly indebted to them for much of his medical knowledge.

Were it not authenticated by the most undeniable testimonies, it would appear incredible that the impostures of the disciples of Aesculapius, and the common faith in his regenerative powers, should have survived with equal potency and acceptation during the ages immediately succeeding the Christian era. It must not however, be forgotten, that these were the times also, when an infinity of superstitious of every description disgraced the Roman world; although it would have appeared a necessary consequence, that their prevalency should have been checked by the increasing determination of learning and science.

If at this period the number of dreaming patients had fallen off at Cos and Epidaurus, the deficiency was amply compensated by the growing popularity of Aesculapius's shrines at Rome, Pergamus, Alaea, Mallos, and other places, where the ancient rituals were faithfully preserved. The highest magistrates in the Roman states not only countenanced, but patronised the superstition; Marcus Aurelius, by the friendship with which he honoured the Paphlagonian imposter Alexander, and Caracalla, by the journey he undertook to Pergamus, to obtain the cure of a disease which inflicted him. This Alexander, the Cagliostro of his age, whose memoirs have been handed down to us by Lucian, made shift to father a new species of juggling upon the ancient process of incubation: for he pretends that it was necessary for him to sleep for a night in the sealed scrips which contain the queries he was to have resolved for those who visited his oracle.[107] During this interval he dexterously opened the scrips, and sealed them up again; pretending that the responses which he delivered to the querists in the morning, had been revealed to him by the deity in a dream.

The priests of Aesculapius possessed a never failing source of information on the recipes or votive tablets with which these temples abounded. These were sometimes engraven on pillars, as at Epidaurus; of which Pausanias says there were six remaining in his time, and besides these, one in particular removed from the rest, on which it was recorded that Hippolytus had sacrificed twenty horses, in return for his having been restored to life by him. Five memorials only of this kind have reached the present age. One of them is to be found in the beginning of Galen's fifth book de Compos, medic.: it is taken from the temple of Phthas, near Memphis, and is the least interesting of the whole. Its subject is the use of the Diktamnus, borrowed from Heras of Cappadocia, a medical writer, frequently quoted by Galen. The remaining four are much more important: they were engraven on a marble slab,[108] of later date at Rome, and are thought, with much probability, to have belonged to the Aesculapian temple in the Insula Tiberina. The present translation, in which some errors either of the artist or copyist are rectified, is extracted from the first volume of Gruter's Corp. Inscriptionum. The narrations are perspicuous and laconic.

1. "In these latter days, a certain blind man, by name Caius, had this oracle vouchsafed to him—'that he should draw near to the altar after the manner of one who could see; then walk from right to left, lay the five fingers of his right hand on the altar, then raise up his hand and place it on his eyes.' And behold! the multitude saw the blind man open his eyes, and they rejoiced, such splendid miracles should signalize the reign of our Emperor Antoninus."

2. "To Lucius, who was so wasted away by pains in his side, that all doubted of his recovery, the god gave this response: 'Approach thou the altar; take ashes from it, mix them up with wine and then lay thyself on thy sore side.' And the man recovered, and openly returned thanks to the god amidst the congratulations of the people."

3. "To Julian who spitted blood, and was given over by every one, the god granted this response: 'Draw near, take pine apples from off the altar, and eat them with wine for three days. And the man got well, and came and gave thanks in the presence of the people."

4. "A blind soldier, Valerius Asper by name, received this answer from the god: that he should mix the blood of a white cock with milk, make an eye ointment therewith, and rub his eyes with it for three days. And lo! the blind recovered his sight, and came, and publicly gave thanks to the god."