The Ægean Sea has ever been the theatre of igneous phenomena, and the three little islands of Thera, Therasia, and Aspronisi, which shut in the Bay of Santorin, are built up chiefly of volcanic materials.[38] In 1573 an eruptive cone suddenly appeared; in 1707 the inhabitants of Santorin saw rise up a short distance from their shores a rock that increased in size for several days and then suddenly split up. This splitting up was succeeded by a great eruption of incandescent materials; an eruption which lasted for no less than five years, forming at the end of that time an island some 400 feet high by 3,279 feet in circumference. In 1866, after many violent shocks of earthquake, the ground was rent asunder on this island and masses of volcanic matter were belched forth, whilst on the other side of the island the soil sank to such a degree that canoes were used to get to houses which but the day before were nine feet above the sea-level. This eruption went on until 1870, and the quantity of scoriæ vomited forth during its continuance welded three islets, which had hitherto been separate, to the principal island, of which they now form part. On entering the Bay of Santorin we see on every side banks of lava, beds of scoriæ, and piles of cinders of a purplish-gray color rising in cliffs to a height of more than 1,312 feet. All these materials are the result of innumerable eruptions, and the central crater of the volcano is probably situated about the middle of the bay. It is supposed that at one time a conical mountain, from 1,958 to 2,600 feet high, rose where soundings now give a depth of water of over 1,300 feet. A sudden break up of the mountain probably produced this abyss, and formidable eruptions have led to the pouring forth of immense quantities of pumice-stone. The three islets mentioned above would be the remains of the old central cone, and a bed of pumice-stone from 98 to 131 feet thick is spread over the whole of their surface, telling of a violent cataclysm of which neither history nor tradition has preserved the memory.
The letters of Pliny the Younger[39] say that the eruption of Vesuvius which caused the destruction of Portici lasted five days, and we know that the houses are covered with a uniformly distributed bed of pumice-stone some thirteen feet thick, and of cinders about three feet thick. Everything points to the conclusion that a very similar catastrophe overtook Santorin; there too whole villages were buried beneath cinders, stones, and molten lava, belched forth by a volcano in action; there too men were the witnesses and the victims of the eruption, as is proved by an accidental circumstance which took place some twenty-three years after.[40]
The removal of the pouzzolana, so called after the volcanic ashes of Pozzuoli in Italy for the works on the Isthmus of Suez, necessitated important excavations, and the cuttings revealed the existence of dwellings which had been bidden away from the light of day for many centuries. The masses of rubbish hiding these prehistoric ruins were some sixty-five feet high, and consisted chiefly of volcanic ashes piled up, for some accidental reason, in comparatively modern times. Beneath the pouzzolana a thin layer of humus contains fragments of pottery of Hellenic origin; which marks the close of the historic period, and covers over the mass of pumiceous tufa vomited out by the volcano. It was in this tufa, which is eight feet thick, that the first signs of buildings were discovered. Further excavation brought to light two houses with doors, windows, and bearing walls. In one of these houses there were five different rooms. Other discoveries rapidly succeeded each other, alike in the island of Therasia and at Acrotiri, the principal island, which has given its name to the group. The plan of these houses is an irregular parallelogram, the angles of which are rounded and the sides more or less curved. This arrangement differs greatly from that adopted in Greece as well as from that in use at Therasia after the time of the volcanic eruptions. The houses too are quite different in their mode of construction. The walls consist of great blocks of lava placed one above the other, without any trace of cement or of lime, and are merely kept in place by a reddish earth mixed with chopped straw or marine algae. Large branches of olive or cypress trees, still with the bark on, are imbedded in the masonry. These pieces of wood, the size of which varies considerably, were probably added to give the necessary solidity to the walls in the numerous earthquakes, the disastrous effects of which were only too well known to the ancient inhabitants of Santorin. It is curious and interesting to note the use of the same expedient among the inhabitants of the islands of the Archipelago who are still exposed to the same danger. The doors and windows are clumsily arched, and the roof seems to have been a low vault. It was made of stones and coated with clay and supported by the trunks of olive trees, the charred remains of which lay upon the floors of the crushed homes. These trunks show no sign of having been touched with metal tools; not a metal nail or clamp has been found, and we cannot but conclude that the remains belong to the age when stone alone was employed.
The inside walls were not glazed or decorated in any way, except in one instance, that of a house at Acrotiri, from which the rubbish has been cleared away, revealing on the walls a layer of lime on which was some colored ornamentation which still retained an extraordinary brilliancy when it was discovered.
In all the houses and in every room of each were found beneath the tufa burying them masses of lava and volcanic scoriae, forming a most eloquent witness of the cause of their destruction. Near one of the houses of Therasia is a little cylindrical structure, about three feet high; which cannot have been a well, as it rests directly on impermeable lava, and was certainly not a cistern, as it is too small for that. May it, as some think, have been an altar? We cannot tell, and though the religious sentiment was probably no more absent among these primitive races than it is among the barbarous peoples of our own day, it does not do to express an opinion in the absence of positive proof.
Successive excavations have yielded a number of objects which throw a new light upon the manners and customs of the inhabitants. Terra-cotta vases are more numerous than anything else ([Fig. 88]), and among them preponderate large yellow vessels capable of holding about one hundred quarts. Most of them have a clumsy brim, and a rough attempt has been made at ornamentation by the potter with his fingers on the damp clay. Other vases of finer clay, colored red or yellow, are covered with ornaments and graceful arabesques; the garlands of fruit and flowers are often of remarkably beautiful workmanship. Cups with well-shaped rounded handles, made of some kind of red ferruginous earth, others of gray material, were picked up in all the houses. These various vessels were used for many different purposes; some to cook food, the marks of the hearth being still on them, whilst others retained some of the chopped straw with which the domestic animals had evidently been fed. The most curious of all are those which are supposed to represent a woman; the front part projecting and surmounted by a narrow neck bent backwards, with two brown prominences supposed to stand for breasts, and dots round the upper part representing a necklace, while ear-rings are indicated by elliptical bands of different colors. We shall have to refer again to these curious vases when we speak of the discoveries made at Troy; we need only add now that the pottery found at Santorin differs completely, alike in form and ornamentation, from the Greek, Phœnician, and Etruscan specimens, of which the museums of Europe contain so many. They are evidently therefore not of foreign origin, but of native manufacture. The absence of clay in the island of Santorin has thrown some doubt on this, however, but the researches of M. Fouqué have revealed the former existence of a large valley, at the base of the principal cone, which valley ran down to the sea-shore near the island of Aspronisi; and in which probably was found the clay which the potters of the district soon learned to turn to account.
Figure 88.
Vases found at Santorin.
With these vases were found some troughs for holding crushed grain, and lava discs very much like those still in use among the weavers of the Archipelago to stretch the woof of their tissues; skilfully graduated lava weights, the correlation of which is very evident, as they weigh 8, 24, and 96 ounces; a flint arrow-head and a saw of the same material with regular teeth; together with a great variety of other objects, including many obsidian arrows and knives, reminding us in their shape of those characteristic of the Stone age in North Europe.