value of which depended on their size. Both Cogolludo and Torquemada speak of copper currency axe-blades, very thin and in the form of an inverted T, which were imported from Mexico. The latter author states that four of these, if new, were equivalent to five _reales_, but that damaged specimens were only valuable for melting down and went at ten to the _real_. Feathers were also employed as currency, and in some places cloth, as in Mexico. The system of enumeration employed in commerce was in the main vigesimal. The count proceeded by fives to twenty, by twenties to one hundred, and by hundreds to four hundred; from this point the higher numbers were reckoned in multiples of twenty. [Illustration: FIG. 60.--Detail from the relief in the great tlaxtli-court at Chichen Itza. (_After Seler_)] The question of war and weapons is particularly interesting from archæological and ethnological points of view. Taken as a whole the monuments show few traces of military activity, and at some sites, notably Copan, Quirigua and Palenque, armed figures are not seen at all, for the axe which appears at the two latter sites is obviously a purely ceremonial object. To omit Yucatan for the moment, it is worthy of notice that reliefs suggesting the figures of warriors are practically only found in the northern portion of the region over which the earlier remains extend, viz. at Piedras Negras, Menché, Naranjo and Tikal. The suggestion is conveyed by the presence of one or more bound figures subsidiary to the main personage represented upon the sculpture, or by the fact that the latter stands upon a crouching figure of distinctly different, and far lower, type of physiognomy. Tikal may almost be omitted from the above list, since only one such relief occurs, and it resembles rather the sculptures of Menché than the archaic stelæ which appear to be more characteristic of the site. It is not absolutely certain, moreover, that the crouching figures which serve as supporters represent actual prisoners, since in some cases the main figure is shown with attributes which are of a purely ceremonial nature; still the arrangement is suggestive, and it is worthy of notice that by far the largest number of such stelæ is found at Naranjo. Where the main figure is shown with a weapon, that weapon is almost invariably a spear with a head of flaked stone. Such spears are always rather elaborate and ornamental in form, and in some cases it is difficult to distinguish them from a ceremonial staff. As stated above, I do not think that the ceremonial axe can fairly be considered a weapon, but one “axe” is shown in the hands of a figure at Menché (stela II), which seems to answer to the description of the “swords” seen by Columbus in Ruatan. The latter consisted of an edging of stone flakes set in a groove in a wooden haft, and secured by lashing of fish intestines. Shields are shown at most sites, and conform in the