Round this primitive city grew up the greater Pompeii. The growth must have been rather by two or three distinct accretions than a gradual and continuous development. At present we cannot trace these stages. To do that we must wait till the excavations can be carried deeper down, and till the other half of the city has been uncovered, or at least till the lines of its streets and the shapes of its house-blocks have been determined, like those of Priene (p. 42), by special inquiry. All that is as yet certain is that Regions I, III, V, and VI were laid out, and their houses were (in part at least) in existence before--perhaps long before--80 B.C., when the Sullan colony was planted,[49] and we see also that Region VI is planned differently from I and III. [49] Region VI contains an ancient column of the sixth century B.C. (Mau, _Führer_, p. 113), but this may not be _in situ_. Another fact claims notice. The town-planning of Pompeii is in the main trapezoidal, not rectangular. Neither its oblongs, nor its squares, nor its street-crossings exhibit true right angles, though many of the rooms and peristyles in the private houses are regular enough. In this feature Pompeii resembles the trapezoidal outlines of the Terremare (fig. 11). It resembles also much Roman military work, both of Republican and of Imperial date, which disregards the strict right angle and accepts squares and oblongs which are, so to say, askew. The motive of the Terremare is supposed to have been, as I have said above, that of providing an easy flow for the water in the encircling moat. The motive of various military camps may perhaps be found rather in a wish to secure the same area as that of an orthodox rectangle, even though the ground forbade the strict execution of the orthodox figure. Whatever the reason, the trapezoidal house-blocks of Pompeii exhibit a feature which is not alien to the earlier town-planning of Italy, though it is strange to the cities of Greece. _Norba_.