_Relief ornament._--Decorative ideas of a purely conventional character are often worked out in both low and salient relief. This is generally accomplished by the addition of nodes and fillets of clay to the plain surfaces of the vessel. Fillets are applied in various ways over the body, forming horizontal, oblique, and vertical bands or ribs. When placed about the rim or base, these fillets are often indented with the finger or an implement in a way to imitate, rudely, a heavy twisted cord--a feature evidently borrowed from basketry. Nodes are likewise attached in various ways to the neck and body of the vessel. In some cases the entire surface of the larger vessels is varied by pinching up small bits of the clay between the nails of the fingers and thumb. An implement is sometimes used to produce a similar result. _Intaglio designs._--The æsthetic tendencies of these potters are well shown by their essays in engraving. They worked with points upon both the plastic and the sun-dried clay, as well as at times upon the fire-baked surface. Figures thus produced exhibit a wide range of artistic achievement. They illustrate all stages of progress from the most archaic type of ornament--the use of dots and straight lines--to the most elegant combinations of curves; and, finally, to the delineation of life forms and fanciful conceptions. Generally, when a blunt implement is employed, the line is produced by a movement that I shall call _trailing_, in contradistinction to _incision_, in which a sharp point is used, and _excision_ or _excavation_, which is more easily accomplished with the end of a hollow reed or bone. _Impressed_ or _stamped_ ornament is of rare occurrence, and anything like _repoussée_ work is practically unknown. The practice of impressing cords and fabrics was common among many of the northern tribes, and nets have been used in the manufacture and ornamentation of vases at many points within this province. The use of stamps, especially prepared, was in vogue in most of the Gulf States, and to a limited extent in northern localities. _Designs in color._--The colors used in painting are white, red, brown, and black, and have generally consisted of thick, opaque, clayey paste, white or colored with ochers. Occasionally the colors used seem to have been mere stains. All were probably laid on with coarse brushes of hair, feathers, or vegetable fiber. The figures are in most cases simple, and are applied in broad, bold lines, indicative of a strong talent for decoration. The forms are, to a great extent, curvilinear, and embrace meanders, scrolls, circles, and combinations and groupings of curved lines in great variety. Of rectilinear forms, lozenges, guilloches, zigzags, and checkers are best known.