THE GENERAL PRINCIPLES OF FORM. 133 people of modern Europe. In their ignorance of the pier and column, the Chaldceans were unable to give their buildings those spacious galleries and chambers which delight the eye while they diminish the actual mass of a building. Their towers were artificial mountains, almost as solid and massive from base to summit as the natural hills from which their lines were taken. 1 A few small apartments were contrived within them, near their outer edges, that might fairly be compared to caves hollowed in the face of a cliff. The weight upon the lower stories and the substructure was therefore enormous, even to the point of threatening destruction by sheer pulverisation. The whole interior was composed of crude brick, and if, as is generally supposed, those bricks were put in place before the process of desiccation was complete, the shrink- age resulting from its continuance must have had a bad effect upon the structure as a whole, especially as the position of the courses and the more or less favourable aspects of the different external faces must have caused a certain inequality in the rate at which that operation went on. The resistance would not be the same at all points, and settlements would occur by which the equilibrium of the upper stages might be compromised and the destruction of the whole building prepared. Another danger lay in the violence of the sudden storms and the diluvial character of the winter rains. Doubtless the outsides of the walls were faced with well burnt bricks, carefully set, and often coated with an impenetrable enamel ; but an inclined plane of a more or less gentle gradient wound from base to summit to give access to the latter. When a storm burst upon one of these towers, this plane became in a moment the bed of a torrent, for its outer edge would, of course, be protected by a low wall. The water would pour like a river over the sloping pavement and strike violently against each angle. Whether it were allowed to flow over the edges of the inclined plane or, as seems more probable, directed in its course so as to sweep it from top to 1 See LAYARD'S account of his excavation in the interior of the pyramidal ruin occupying a part of the platform which now surmounts the mound of Nimroud. From two sides trenches were cut to the centre ; neither of them encountered a void of any kind (Nineveh and its Remains, vol. ii. p. 107). At a later period further trenches were cut and the rest of the building explored (Discoveries, pp. 123-129). The only void of which any trace could be found was a narrow, vaulted gallery, about 100 feet long, 6 wide, and 12 high. It was closed at both ends, and appeared never to have had any means of access from without.
