The second, that they were temples.

The third, that they were tombs.

188. Map of La Giara. From De la Marmora.

Looking at the positions in which they are found, the first of these theories is not so devoid of foundation as might at first sight appear. As a rule, they are all placed on heights, and at such distances as to be seen from one another, and consequently be able to communicate by signal at least. Take such an example, for instance, as that of Giara, near Isili ([woodcut No. 188]). Any engineer officer would be delighted with the manner in which the position is taken up. Every point of vantage in the circumference is occupied, and two points in the interior fortified, so as to act as supports. The designer of the entrenched camp at Linz might rub his eyes in astonishment to find his inventions forestalled by three thousand years, and by towers externally so like his own as hardly to be distinguishable to an unpractised eye. The form of the towers themselves lends considerable plausibility to the defensive theory. Such a Nurhag, for instance, as that of Santa Barbara (woodcuts [Nos. 186], [187]), surrounded by four lesser ones, connected by a platform, and dominated by the central tower, is a means of defence we might now adopt, provided we may assume the existence of a parapet, which has fallen through age.

When we come to look a little more closely at this military question, we perceive that we are attempting to apply to a people who certainly had no projectiles that would carry farther than arrows, principles adapted to artillery or musketry fire. The Nurhags are placed at such distances as to afford no support to one another before the invention of gunpowder, and though in themselves not indefensible, they possess the radical defect of having no accommodation for their garrisons. It is impossible that men could live, cook, and sleep in the little circular apartments in their interior, and the platforms added very little to their accommodation. Had the four detached Nurhags at Santa Barbara been connected with walls only, so as to surround the central tower with a court, the case would have been very different; but as in all instances this is filled up, so as to form a platform, it is evident that it was exposure, not shelter, that was sought in their construction.[501]

Another, and even stronger, argument is derived from their number. De la Marmora asserts that the remains of at least three thousand Nurhags can now be traced in Sardinia,[502] and there seems no reason to doubt the truth of his calculation, nor his assertion that they were once much more numerous, and that they are dispersed pretty evenly over the whole island. Can any one fancy a state of society in such an island which would require that there should be three thousand castles and yet no fortified cities as places of refuge? They were not erected to protect the island against a foreign enemy, because most of them are inland. They could not be made to serve for the protection of the rich during insurrections or civil wars, nor to enable robbers to plunder in security the peaceful inhabitants of the plain. In short, unless the ancient Sardinians lived in a state of society of which we have no knowledge elsewhere, these Nurhags were certainly not military works.

When we turn to the second hypothesis and try to consider them as temples, we are met by very much the same difficulties as beset the fortification theory. If temples, they are unlike the temples of any other people. Generally it is assumed that they were fire temples, from their name Nur—in the Semitic languages signifying fire—but more from their construction. The little circular chambers in their interiors are admirably suited for preserving the sacred fire, and the external platforms as well adapted for that Sabean worship of the planets which is generally understood to be associated with fire-worship. But assuming this to be the case, why so numerous? We can count on our fingers all the fire-temples that exist, or were ever known to exist, in fire-worshipping Persia; and if a dozen satisfied her spiritual wants, what necessity was there for three thousand, or probably twice that number, in the small and sparsely inhabited island of Sardinia? Had every family, or little village community its own separate temple on the nearest high place? and did each perform its own worship separately from the rest? So far as we know, there is no subordination among them, nothing corresponding to cathedrals, or parish churches or chapels. Some are smaller, or some form more extensive groups than others, but a singularly republican equality reigns throughout, very unlike the hierarchical feeling we find in most religions. In one other respect, too, they are unlike the temples of other nations. None of them are situated in towns or villages, or near the centres of population in the island.

Must we then adopt the third hypothesis, that they were tombs? Here again the same difficulties meet us. If they were tombs, they are unlike those of any other people with whom we are acquainted. Their numbers in this instance is, however, no difficulty. It is in the nature of the case that sepulchres should accumulate, and their number is consequently one of the strongest arguments in favour of this destination. Nor does their situation militate against this view. Nothing is more likely than that a people should like to bury their dead, on high places, where their tombs can be seen from afar. In fact, there does not seem much to be said against this theory, except that no sepulchral remains have been found in them. It is true that De la Marmora found a skeleton buried in one at Iselle,[503] and apparently so placed that the interment must have taken place before the tower was built, or at all events finished; but the presence of only one corpse in two thousand nurhags tells strongly against the theory, as where one was placed more would have been found had this form of interment been usual, and amidst the hundreds of ruined and half-ruined nurhags some evidence must have been found had any of the usual sepulchral usages prevailed. To my mind the conclusion seems inevitable that, if they were tombs, they were those of a people who, like the Parsees of the present day, exposed their dead to be devoured by the birds of the air. If there is one feature in the nurhags more consistent or more essential than another, it is that of the stairs or ramps that give access to their platforms. It shows, without doubt, that, whether for defence, or worship, or burial, the platform was the feature for which the edifice was erected, and there it must have been that its purposes were fulfilled. But is it possible that such a practice ever prevailed in Sardinia? It is, of course, precipitate to answer that it did. But the custom is old. Anything so exceptional among modern usages is not the invention of yesterday, and it may have been far more prevalent than it now is, and it may in very ancient times have been brought by some Eastern colonists to this Western isle. I dare hardly suggest that it was so; but this is certain, that such towers would answer in every respect perfectly to the "Towers of Silence" of the modern Persians, and the little side chambers in the towers would suit perfectly as receptacles of the denuded bones when the time arrived for collecting them.