effect.]

[Illustration: FIG. 298. Elaboration of diagonal combination, giving
triangular figures.]

This example is from an ancient work basket obtained at Ancon, Peru,
and shown in Fig. 299. The surface features are in strong relief,
giving a pronounced herring bone effect.

[Illustration: FIG. 299. Peruvian work basket of reeds, with strongly
relieved ridges.]

Slight changes in the succession of parts enable the workman to
produce a great variety of decorative patterns, an example of which is
shown in Fig. 298. A good illustration is also seen in Fig. 286, and
another piece, said to be of Seminole workmanship, is given in Fig.
300. These and similar relieved results are fruitful sources of
primitive decorative motives. They are employed not only within the
art itself, but in many other arts less liberally supplied with
suggestions of embellishment.

[Illustration: FIG. 300. Effects produced by varying the order of
intersection. Seminole work--1/8.]

Taking a second type of combination, we have a family of resultant
patterns in the main distinguishable from the preceding.

[Illustration: FIG. 301. Surface effect in open twined combination.]

[Illustration: FIG. 302. Surface effect of twined, lattice combination