As this is the first time a setting star has been in question, it is well to point out that in this case the ancient Egyptians no longer typified the star as a goddess but as a god--and, more than this, as a dying god; for Khons is always represented as a _mummy_--the Osiris form. Egyptologists state that both Thoth and Khons were moon-gods. Perhaps the lunar attributes were assigned prior to the establishment of sun-worship. I shall show, subsequently, that the temples now being considered find their place in continuous series stretching back in the case of Amen-t to 3750 B.C., and in the case of Khons to possibly a long anterior date. In the case of Amen-t and Khons, therefore, where we are free from the difficulties connected with the interchange of the titles of Isis and Hathor at Denderah, the star-cults stand out much more clearly, and we get a step further into the domain of mythology. But what did the cults mean? What was the utility of them? What their probable origin? The cult of Sirius we already understand. I will deal with Amen-t first. No doubt it will have been already asked how it came that such an unfamiliar star as Phact had been selected. Here the answer is overwhelming. This star, although so little familiar to us northerners, is one of the most conspicuous of the stars in the southern portion of the heavens, _and its heliacal rising heralded the solstice and the rise of the Nile before the heliacal rising of Sirius was useful for that purpose_! In Phact we have the star symbolised by the ancient Egyptians under the name of the goddess Amen-t or Teχi, whose figure in the month table at the Ramesseum leads the procession of the months. Amen-t, the wife of the solstitial sun-god Rā, symbolised the star the rising of which heralded the solstice; and the complex title Amen-Rā signified in ancient times, to _those who knew_, that the solstitial sun-god Rā, so heralded, was meant. The answer is clear, though not so simple in the case of Khons. The setting of Canopus marked the autumnal equinox about 5000 B.C. We have found that the first Khons temple at Karnak was possibly built as late as 2000 B.C., when the utility of the observations of Canopus from this point of view had therefore ceased; but it is also known that Khons was a late addition to the Theban triad, and I shall subsequently give evidence that the worship was introduced from the south, where it had been conducted when the condition of utility held. The time of introduction to Thebes was the beginning of the eighteenth dynasty, when the priests wished to increase their power by conciliating all worships; and we now see that with their local sun-god Amen-Rā and the goddess Amen-t, with the Northern Mut (Isis) and the Southern Khons, the Theban triad represented the worship of Central, Northern and Southern Egypt.