I think the strongest argument against the supposed aspirating power of medial _v_, and its subsequent disappearance, lies in the fact that there are so many words having medial _v_, which show no trace of this phonetic process (Curtius, p. 507). On the other hand, it should be borne in mind, that the Greeks might have felt a natural objection to the forms which would have rendered +deva+ with real exactness, I mean δοιός or δέος, the former conveying the meaning of double, the latter of fear. A mere wish to keep the name for god distinct from these words might have produced the phonetic anomaly of which we complain; and, after all, though I do not like to use that excuse, there are exceptions to phonetic laws. No one can explain how ὄγδοος was derived from ὀκτώ or ἕβδομος from ἑπτά, yet the internal evidence is too strong to be shaken by phonetic objections. In the case of θεός and _deus_ the internal evidence seems to me nearly as strong as in ὄγδοος and ἕβδομος, and though unwilling to give a final verdict, I think the question of the loss in Greek of the Aryan word for god and its replacement by another word nearly identical in form, but totally distinct in origin, should be left for the present an open question in Comparative Philology. NOTE B. THE VOCATIVE OF +DYAÚS+ AND Ζεύς. The vocative of +Dyaus+, having the circumflex, is one of those linguistic gems which one finds now and then in the Rig-Veda, and which by right ought to have a place of honor in a Museum of Antiquities. It is a unique form. It occurs but once in the Rig-Veda, never again, as far as we know at present, in the whole of Vedic literature, and yet it is exactly that form which a student of language would expect who is familiar with the working of the laws of accent in Sanskrit and in Greek. Without a thorough knowledge of these laws, the circumflexed vocative in Sanskrit, +Dyaûs+, corresponding to Greek Ζεῦ, would seem a mere anomaly, possibly an accidental coincidence, whereas in reality it affords the most striking proof of the organic working of the laws of accent, and at the same time an unanswerable testimony in favor of the genuineness of the ancient text of the Rig-Veda. The laws of accent bearing on this circumflexed vocative are so simple that I thought they would have been understood by everybody. As this does not seem to have been the case, I add a few explanatory remarks.