When we come to examine these non-solar temples, the first question is, Do they resemble the solar ones in construction? Are the horizontal telescope conditions retained? The evidence on this point is overwhelming. Take the Temple of Hathor at Denderah. It points very far away from the sun; the sun's light could never have enfiladed it; in many others pointing well to the north or south the axis extends from the exterior pylon to the Sanctuary or Naos, which is found always at the closed end of the temple; we have the same number of pylons, gradually getting narrower and narrower as we get to the Naos, and in some there is a gradual rise from the first exterior pylon to the part which represents the section of the Naos, so that a beam of horizontal light coming through the central door might enter it over the heads of the people flocking into the outer courts of the temple, and pass uninterruptedly into the Sanctuary. In this way the Egyptians had, if they chose to use it, a most admirable arrangement for observing, with considerable accuracy, either the rising or the setting of any celestial body, whether it were sun or star, and especially the possibility of observing a _cosmical_ rising, as the eye was shielded from the sunrise light, and the place of rising was completely indicated. In these, as at Karnak, we have a collimating axis. We have the other end of the temple blocked; we have these various diaphragms or pylons, so that, practically, there is absolutely no question of principle of construction involved in this temple that was not involved in the great solar temple of Amen-Rā itself. We made out that in the case of the temples devoted to sun-worship and to the determination of the length of the year, there was very good reason why all these attempts should be made to cut off the light, by diaphragms and stone ceilings, because, among other things, one wanted to find the precise point occupied by the sunbeam on the two or three days near the winter or summer solstice in order to determine the exact moment of the solstice. But if a temple is not intended to observe the sun, why these diaphragms? Why keep the astronomer, or the priest, so much in the dark? There is a very good reason indeed.