In Plate LVI (our Fig. 48) the mask at the foot of the cross is a human mask, and not a serpent mask, as has been ingeniously proved by Dr. HARRISON ALLEN in his paper so often quoted. It is the mask of _Tlaloc_, as shown by the teeth and corroborated (not proved) by the way in which the eye is expressed. The curved hook within the eyeball here, as in 185, stands for the air--the wind--of which _Tlaloc_ was also god. The Mexicans had a similar sign for breath, message. The _chiffre_ 1975, on which _Huitzilopochtli's_ priest is standing, I believe to be the synonym of 185 in Plate XXIV. Just in front of _Tlaloc's_ priest is a sacrificial yoke (?), at the top of which is a face, with the eye of the _Tlalocs_, and various decorations. This face is to be found also at the lower left-hand corner of Plate XLI (of STEPHENS'), and also (?) in the same position in Plate XLII (of STEPHENS'). These will serve as subjects for further study. Notice in Plate LVI (our Fig. 48) how the ornaments in corresponding positions on either side of the central line are similar, yet never the same. A careful study of these pairs will show how the two gods celebrated, differed. A large part, at least, of the attributes of each god is recorded in this way by antithesis. I have not made enough progress in this direction to make the very few conclusions of which I am certain worth recording. The general fact of such an antithesis is obvious when once it is pointed out, and it is in just such paths as this that advances must be looked for. I have just mentioned, in this rapid survey of the plates of vol. ii of STEPHENS' work, the principal pictorial signs relating to _Tlaloc_. There are a number almost equally well marked in vol. i, in Plates VII, IX, X, XIII, and XV, but they need not be described. Those who are especially interested can find them for themselves. The following brief account and plate of a _Tlaloc_ inscription at Kabah will be useful for future use, and is the more interesting as it is comparatively unknown. _INSCRIPTION AT KABAH (Yucatan)._ This hitherto unpublished inscription on a rock at Kabah is given in _Archives paleographiques_, vol. i, part ii, Plate 20. It deserves attention on account of its resemblances, but still more on account of its differences, with certain other Yucatec glyphs. We may first compare it with the Plate LX of STEPHENS (our Fig. 59). The head-dress in Plate 20 is quite simple, and presents no resemblance to the elaborate gear of Plate LX, in which the ornament of a leaf (?), or more probably feather, cross-hatched at the end and divided symmetrically by a stem (?) or quill about which four dots are placed, seems characteristic.