I have previously noted the symbolism of Sirius-Hathor as a cow in a boat associated with the constellation of Orion. There is a point connected with this which I did not then refer to, but which is of extreme importance for a complete discussion of the question now occupying us. We get associated with the cow in the boat, Orion (Sah) as Horus, but in other inscriptions we get Orion as a mummy--that is to say, in the course of Egyptian history the same constellation is symbolised as a rising sun at one time and a setting sun at another. Now, that must have been so if the Egyptian mythology were consistent and rested on an astronomical basis, because Sah rose in the dawn in one case and faded at dawn in the other. From the table giving a generalised statement with regard to Osiris, similar to that we have already considered for Isis, it looks as if the mythology connected with Osiris is simply the mythology connected with any celestial body becoming invisible. We have the sun setting, the moon waning, a planet setting, stars setting, constellations fading at dawn. We see, therefore, that the Egyptian mythology was absolutely and completely consistent with the astronomical conditions by which they were surrounded; that, although it is wonderfully poetical, in no case is the poetry allowed to interfere with the strictest and most accurate reference to the astronomical phenomena which had to be dealt with. The argument, then, for the use of Isis as a generic name is greatly strengthened by the similar way in which the term Osiris, which is acknowledged to be a generic name, is employed. Now to return to Denderah in the light of the preceding discussion. A curious and interesting thing is that we find that the temple of _Isis_, which is very much ruined, does not contain emblems of the Sirius worship; but that all these appear in the temple of _Hathor_, which, of course, pointing as it does to the north-east, could never have received any light from a star south of the equator. There has been a change of cult. On the other hand, the temple of Isis presents so many emblems thought to relate to the worship connected with γ Draconis, to which the temple of Hathor was in all probability directed, that it was named the Typhoneum by the French Commission. There has been an apparent change of _rôle_ and cult, due either to the fact that in time the observation of the rising of Sirius superseded that of the rising of γ Draconis, or that the worship of Set was replaced.