We find, for instance, on the one hand the undoubted application which is connected with the idea of cloud or rain. Thus, in the hieroglyph, figure 80, the accompanying hieroglyph of figure 46, i. e., the bird Moan. So also the one in figure 28 (p. 107) the accompanying hieroglyph of the name Kinchahau, which, besides cauac, contains further the element of fire and that of the hatchet, which may remind us of the ray [or flash] darting from the cloud. The hieroglyph cauac is, however, used far more commonly in the sense of "stone" or "heaviness." This is most clearly shown in the case of the animal figures pictured in Cod. Tro. 9a and 22*a, where the stone laid upon and weighing down the horizontal beam is represented by the element cauac. But this explanation must be accepted also, because we find the pyramidal foundation of the temple covered with the element cauac. And where, in Cod. Tro. 15*a, to the Chac who is felling a tree is opposed the death god, also felling a tree, covered by the element cauac, it is clear that here there is substituted with the death god a rigid stone in place of what with the Chac is a sprouting tree. The numerous cases in which the hieroglyph cauac serves as a seat or footstool of the gods are sometimes easily interpreted as signifying clouds, but in the majority of cases it undoubtedly represents "stone," homologous to the hieroglyph caban and the element _tun_, "stone," itself (figure 85), both of which are found equally often denoting the seat and footstool of the gods. It is equally evident that in the hieroglyph figure 84, in which there is indicated the bearing of a burden on the back, the element cauac is to be understood simply as the expression of the weight, the burden. In the peculiar cases where we see the gods holding a board provided with the elements of the character cauac, or where a board is placed before the gods, furnished with a plaited handle whose side bears the element cauac, the latter seems to relate to a sounding board, for the accompanying hieroglyphs seem to signify music. Finally, there can be found a direct homology between the element cauac and the element tun. This is seen in the hieroglyph of the hunting god of figure 83, whose distinguishing mark is usually an eye or the element tun (i. e., a precious stone), which he hears in the front of the headdress. The hieroglyph of this god is written sometimes as in figure 81, sometimes as figure 82. And that the element here, which in figure 82 replaces the element cauac, is to be understood in fact as tun or "stone, precious stone," is evident, on the one hand from the application of the precious stone in the headdress (tun, "piedra, piedra preciosa"), and, on the other hand, from its use as the base of the pole on which Mam, the Uayeyab demon, is set up during the xma kaba kin (Cod. Dres. 25c). Now, it is true that a connection of ideas can be established with considerable certainty between clouds, rain, and stone, for in that region every rain was a thunderstorm. But at the same time it will be found comprehensible that a barrier of doubt was removed when I discovered in the course of my Zapotec studies that in Zapotec the same word was used for "rain" and "stone," namely, _quia_, _quie_.