_Material._--The material used in the manufacture of this ware is remarkably uniform throughout the whole province, varying slightly with the locality, with the group, and with the character of the vessel constructed. Generally the paste consists of a matrix of fine clay tempered with finely pulverized sand, in which may be detected grains of quartz, feldspar, hornblende, augite, particles of iron oxide, &c. Argillaceous matter has been sparingly used, the sand in many cases comprising at least 75 per cent. of the mass. Many of the unpainted specimens, from which the polished slip has been removed, give off showers of fine sand when rubbed by the hand, and it is difficult to detect the presence of any finely comminuted matrix whatever. The thin slip employed in surface finish is more highly argillaceous than the paste. The clay used was probably mostly light in color, as the paste is now quite uniformly so. The baking was effected apparently without a very high degree of temperature and by methods that left few marks or discolorations upon the vessels. In hardness and durability the paste corresponds pretty closely with that of our red porous earthenware. The softer pieces can be scratched or even carved with a knife. Water will penetrate any of these vessels in a few minutes, but decay has probably tended to make the walls more porous. _Manufacture._--There is no piece of this ware that does not bear evidence of a high degree of skill on the part of the potter; and yet, owing to the thorough manner in which the work is finished, the precise methods of manipulation are not easily detected. So great is the symmetry and so graceful are the shapes that one is led to suspect the employment of mechanical devices of a high order. The casual observer would at once arrive at the conclusion that the wheel or molds had been used, but it is impossible to detect the use of any such appliances. We observe that irregular and complex forms, in the production of which mechanical appliances could not be used to advantage, are modeled with as much grace of contour and perfection of surface as are the simpler shapes that could be turned upon a wheel, and we conclude that with this remarkable people the hand and the eye were so highly educated that mechanical aids were not indispensable. I find no evidence that coil building was systematically practiced, but it is clear that parts of complex forms were modeled separately and afterwards united. The various ornaments in relief (the heads and other parts of animals) and the handles, legs, and bases of vessels were constructed separately and then luted on, and with such skill that the thinnest walls and the most complex and delicate forms were not injured in the process. The contact irregularities were then worked down, and every part of the surface, including the more important ornaments, were rendered smooth, preparatory to the application of the thin surface wash or slip. After