The method of building the Etruscan walls is particularly a case in point. The resemblance of these to the most ancient fortifications of Greece makes possible, though it does not establish, an intimate communication between the two races, to which also the use of Greek letters for the strange Etruscan language certainly points. The so-called Cyclopean jointing, however, presents itself in every civilized land where rock is found which naturally breaks in polygonal forms. So also square-stone masonry early appears wherever the material, quarried without difficulty in rectangular forms, favors this more satisfactory method. Besides both these varieties, the Etruscans made use of bricks, as shown by the foundations of the walls of Veii, which above-ground are mainly built of cut stone. These are at least as ancient as the time of the later kings.
[Illustration: Fig. 247.--Gate of Falerii.]
[Illustration: Fig. 248.--Canal of the Marta.]
Some of the remaining ruins of Etruria, and of Central Italy--for the peculiar civilization of that region is not strictly confined to the limits of the Etruscan language--show in the building of gates a new technical element. It has been seen how the Greeks in vain sought a substitute for the arch, to them an inadmissible, if not an unattainable, feature; and exhausted every conceivable method of horizontal stone-laying in order to cover their gateways. Similar evasive attempts are not wanting in Etruria; the Cyclopean walls, especially, present portal constructions similar to those of Mykenæ. But through the perfection of stone-cutting, and building with rectangular blocks, the ceiling of the passage by means of the arch was early attained. That this step was taken before the invasion of the Gauls is shown by the still remaining Gate of Falerii (_Fig._ 247), which city, as is well known, lost its importance under Camillus. It is not certain whence the people of Central Italy attained their knowledge of the arch. Though it had been familiar to the Assyrians as early as the ninth century B.C., it is possible that they made this important discovery independently, perhaps somewhat later than the Mesopotamians. The vault of the Cloaca Maxima in Rome dates from the sixth century B.C., but it shows, even at this early period, a perfection which gives evidence of long previous use. Canal-building was one of the first conditions of existence on the western coast of Central Italy, where the drainage of the swamps--the neglect of which, since the Middle Ages, has reduced the once populous Maremma to a pestilential desert--the discharge of the mountain lakes, which otherwise overflow from time to time, desolating the lower country, and the regulation of the river-courses, alone made possible the settlement of a people and the founding of flourishing cities west of the Apennines. It is therefore not improbable that the great canal discovered by Dennis, which once drained the swampy Valley of the Marta, preceded the Cloaca Maxima, and, indeed, antedated the Roman period altogether. (_Fig._ 248.) The enormous stones employed in its construction, and its great extent, display, even in this primitive age, that marked inclination for works of general usefulness which distinguished the people of Italy above all others of antiquity.