And now let us consider how this theory accords with the result to which we were led by the position of the great vacant space around the southern pole. So far as the date is concerned, we have already seen that the epoch 2170 B.C. accords excellently with the evidence of the vacant space. But this evidence, as I mentioned at the outset, establishes more than the date; it indicates the latitude of the place where the most ancient of Ptolemy's forty-eight constellations were first definitely adopted by astronomers. If we assume that at this place the southernmost constellations were just fully seen when due south, we find for the latitude about thirty-eight degrees north. (The student of astronomy who may care to test my results may be reminded here that it is not enough to show that every star of a constellation would when due south be above the horizon of the place--what is wanted is, that the whole constellation when towards the south should be visible at a single view. However, the whole constellation may not have included all the stars now belonging to it.) The station of the astronomers who founded the new system can scarcely have been more than a degree or two north of this latitude. On the other side, we may go a little further, for by so doing we only raise the constellations somewhat higher above the southern horizon, to which there is less objection than to a change thrusting part of the constellations below the horizon. Still it may be doubted whether the place where the constellations were first formed was less than 32 or 33 degrees north of the equator. The Great Pyramid, as we know, is about 30 degrees north of the equator; but we also know that its architects travelled southwards to find a suitable place for it. One of their objects may well have been to obtain a fuller view of the star-sphere south of their constellations. I think from 35 to 39 degrees north would be about the most probable limits, and from 32 to 41 degrees north the certain limits of the station of the first founders of solar zodiacal astronomy. What their actual station may have been is not so easily established. Some think the region lay between the sources of the Oxus (Amoor) and Indus, others that the station of these astronomers was not very far from Mount Ararat--a view to which I was led long ago by other considerations discussed in the first appendix to my treatise on 'Saturn and its System.' At the epoch indicated, the first constellation of the zodiac was not, as now, the Fishes, nor, as when a fresh departure was made by Hipparchus, the Ram, but the Bull, a trace of which is found in Virgil's words-- Candidus auratis aperit cum cornibus annum Taurus.