In Lord Kingsborough’s Collection, Vol. V., pages 115–124, there are two printed alphabetical indices of the names of all the towns, whose hieroglyphic symbol, or, as we term it, whose coat of arms, is represented in the Codex Mendoza, to be found in Vol. I. of the same collection, pages 1–72. This Codex is arranged in three sections. The first shows the picture-annals of the ancient Aztec-Kings, and the cities which they conquered (pages 1–17). The second reproduces again the coats of arms of these cities, but gives in addition the pictures of all the objects of tribute which these cities had to pay. The third section exhibits an illustration of how Mexican children were trained from infancy up to their 15th year. Sections first and second will claim our interest, exclusively. Copper, we learn from the Dictionary of Molina[5] was named in the language of the Nahoa speaking natives, _tepuzque_.[6] Upon searching in the above quoted Codices, we find three names of towns which are compounds of this word _tepuzque_. Their names appear in the following form: Tepoztla, Vol. I., page 8, fig. 2, and the same name on page 26, fig. 13. Tepoztitla, page 42, fig. 10, and Tepozcolula, page 43, fig. 3. The cuts 1, 2, 3 and 4, are faithful reproductions of the coats of arms belonging to these towns. [Illustration: CUT 1. Tepoztla. ] [Illustration: CUT 2. Tepoztla. ] [Illustration: CUT 3. Tepoztitla. ] [Illustration: CUT 4. Tepozcolula. ] There cannot be any doubt as to the meaning of the objects represented by these pictures. They mean axes. Their handles appear in a curved form, the blades at their cutting edges are somewhat rounded, and the tenons of the blades are inserted below the top of the handles. Both handles and blades are painted in a reddish brown color, the wood as well as the copper. The differences between the pictured representations are the following: Cuts 1, 2, and 4, show the axes growing out from the top of a mountain, whilst the axe of cut 3 appears by itself. Further, the axes of cuts 1 and 2, those of _Tepoztla_, show something applied to the handle, which in cut 1 we recognize to be a single bow-knot, and in cut 2 the same girdle with a bow-knot, yet wound about a dress of white color, embroidered with red spots. A notable difference, however, will still be noticed between the form of the axes in cuts 1, 2, 3, and that in cut 4, or _Tepozcolula_. We shall speak of this latter, on a later page, as an instrument very closely related to the other axes. By means of these pictures we arrive at the knowledge of the following facts: Copper was undoubtedly found in the neighborhood of the three named cities. Moreover, copper in these cities was wrought into axe-blades. Finally, the axe will turn out to be the symbol used for copper, in general.