Diagonally or directly _intersecting lines_ form another universal element of early decoration, varying from a simple arrangement of cross lines 22[54]mesh to an elaborate diaper-pattern, and in such forms found even in later times. Beginning with the simple intersecting lines, or bands filled in with hatching, of the primitive incised vases, further developed in the white slip ware of Cyprus (Vol. I. p. 243), we next come to their use on the vases of the Geometrical period, both in Greece and in Cyprus. The variety of these patterns is so great that they can hardly be described in any detail; the usual method of treatment is in a band or panel of lozenges, squares, or triangles, filled in with a reticular pattern formed by the short intersecting lines. Sometimes dots are inserted in the spaces to enrich the general effect. Some very good examples of these patterns are to be seen in the Geometrical vases of Apulia (p. 327). In the B.F. period plain bands or panels of intersecting lines are not infrequent; sometimes small amphorae or lekythi are decorated entirely in this fashion.[2023] A variation of the motive is the border of network which often surrounds the panels on hydriae or oinochoae, in which the points of intersection are ornamented with studs, resembling the knots of a net (Fig. 145). It is also frequently found on the later Corinthian vases. _Chequer-patterns_ are often used with great effect, at all periods from the Geometrical vases down to the fourth century, their usual position being on the neck of a vase (Fig. 146).[2024] [Illustration: FIG. 146. CHEQUER-PATTERN.] [Illustration: FIG. 147. PROTOTYPE OF GEOMETRICAL TANGENT-CIRCLES.]