For instance, you have heard sometimes of the strange custom in accordance with which the father of a new-born child goes to bed and is nursed as an invalid. You are perhaps aware that this custom, that appears so strange to us and is now restricted to a few savage tribes, was noted in ancient times in Europe itself, and has been preserved almost to our own time in certain cantons of the Pyrenees. It must therefore have been extremely wide-spread. Yet for a long time it seemed inexplicable. But now, thanks to investigations and comparisons, the explanation has been found. There is no doubt that the custom in question rested on the idea that there was a close solidarity between the health of the father and that of the new-born babe, so that if the father should fall sick, his far weaker child would die. The father, therefore, must be guarded from all over-exertion, must abstain from all excess--in short, was best in bed! So, too, in the present case. How are we to explain the resemblance between the treatment of the Vestals at Rome and the Virgins of the Sun at Cuzco? It was once impossible, but now that we are better acquainted with the genesis, the spirit, the inner logic of the primitive religions, and the modes of life, the wants and the apprehensions proper to the pre-historic ages, we have no difficulty in attaching two parallel customs to a single religious principle which had found acceptance alike in Italy and Peru. And this is one of the chief tasks, and one of the greatest charms, of the branch of study which I have the honour of professing. It shows us that even in human error, human reason has never abdicated its throne. We have still to speak of the temples, the ritual and the chief festivals of ancient Peru. To these subjects we shall devote the first part of our sixth and last Lecture, reserving the closing portion for the conclusions and the general lessons suggested by our two-fold study of Mexico and Peru. LECTURE VI. PERUVIAN CULTUS AND FESTIVALS.--MORALS AND THE FUTURE LIFE.--CONCLUSIONS. LADIES AND GENTLEMEN, To complete my account of the native religion of Peru, I have still to speak of the cultus, the festivals, the religious ethics, and the ideas of a future life. I.