Perhaps, however, it was not the form of the dolmen which was brought by commerce, but simply the art of architecture in general, and this was adapted to burial purposes. To this there are serious objections. In the first place it does not explain why exactly the same types of building (e.g. the dolmen), showing so many similarities of peculiar detail, occur in countries so far apart; and in the second place, if what was carried by trade was the art of building alone, why should the learners go out of their way to use huge stones when smaller ones would have suited their purpose equally well? That the megalithic builders knew how to employ smaller stones we know from their work; that they preferred to use large ones for certain purposes was not due to ignorance or chance, it was because the large stone as such had some particular meaning and association for them. We cannot definitely say that large stones were themselves actually worshipped, but there can be no possible doubt that for some reason or other they were regarded as peculiarly fit to be used in sanctified places such as the tombs of the dead. It is impossible that the men who possessed the skill to lay the horizontal upper courses of the Hagiar Kim temple should have taken the trouble to haul to the spot and use vast blocks over 20 feet in length where far smaller ones would have been more convenient, unless they had some deep-seated prejudice in favour of great stones. Such are the main difficulties involved by the influence theory. On the other hand, objections have been urged against the idea that the monuments were all built by one and the same race. Thus Dr. Montelius in his excellent _Orient und Europa_ says, "In Europe at this time dwelt Aryans, but the Syrians and Sudanese cannot be Aryans," the inference being, of course, that the European dolmens were built by a different race from that which built those of Syria and the Sudan. Unfortunately, however, the major premise is not completely true, for though it is true that Aryans did live in Europe at this time, there were also people in Europe who were not Aryans, and it is precisely among them that megalithic buildings occur.