The convenient terms of Druid altars and temples have long supplied a ready resource for the absence of all knowledge of their origin or use. The cromlech has at length been restored to its true character as a sepulchral monument by the very simple process of substituting investigation for theory. But after the devotion of many learned and ponderous volumes to the attempted elucidation of Druidism, the subject has lost little of its original obscurity; and we shall follow a safer, if it be a less definite guide, in tracing the peculiar character of the so-called Druidical monuments to feelings which appear to have exercised so general an influence on the human race. The idea of the origin of these monolithic structures from some common source seems to have suggested itself to many minds. Colonel Howard Vyse, when describing the great hypæthral court, surrounded with colossal figures, which stands before the rock temple of Gerf Hossein, the ancient Tutzis, remarks:--"The massive architraves placed upon the top of these figures reminded me, like those at Sabooa, of Stonehenge; and it is not improbable that, together with religious traditions, the art of building temples may have even reached that place from Egypt."[130] To speak, as some recent writers have done, as if the mechanical and engineering knowledge by which the Egyptians were able to quarry and erect their gigantic monoliths had become even a greater mystery to us than the hieroglyphic legends which they inscribed on them, is manifestly a hasty and altogether unfounded assumption. It is their taste, and not their skill, which is wanting. The modern eye is satisfied with the perfect proportions of the monumental column, without seeking the barbaric evidence of difficulties overcome implied in the lifting of it in one mass upon its pedestal. A few years since the workmen in Craigleith quarry, near Edinburgh, disengaged a mass of the fine sandstone of the district, capable of rivalling the colossal obelisks of Egypt; but the proprietor in vain advertised the feat, in the hope that some committee of taste would avail itself of the opportunity of once more erecting a British monolith of primitive mass; and he had at last to break it down into cubes adapted to the ordinary wants of the modern builder. When, however, such a feat has to be accomplished as the spanning of the Menai Straits with a railway viaduct, no lack of engineering skill is felt in coping with difficulties which may stand comparison with the most gigantic of the self-imposed feats of the old Egyptian builder.[131] We may fairly presume, therefore, that we have left the monolithic era behind us, not by the oblivion of former knowledge, but by the progress of the human mind beyond that stage of development when it finds its highest gratification in such displays of rude magnificence and vast physical power.