The town areas with which we have now to deal are small squares or oblongs; they are divided by two main streets into four parts and by other and parallel streets into square or oblong house-blocks ('insulae'), and the rectangular scheme is carried through with some geometrical precision.

The 'insulae', whatever their shape--square or oblong--are fairly uniform throughout.

Only, those which line the north side of the E.and W.street are often larger than the rest (pp.

88, 125).[58] The two main streets appear to follow some method of orientation connected with augural science.

As a rule, one of them runs north and south, the other east and west, and now and again the latter street seems to point to the spot where the sun rises above the horizon on the dawn of some day important in the history of the town.[59] [58] Modern plans seem sometimes to imply that the 'insulae' which abutted on the walls were also abnormally large.