These objects, and the workshops where they were made, might therefore be less ancient than the greater part of the inscribed monuments. But if so far we had found no examples of any work belonging to the first ages, we met in historic times with certain customs which were out of harmony with the general civilization of the period. A comparison of these customs with analogous practices of barbarous nations threw light upon the former, completed their meaning, and showed us at the same time the successive stages through which the Egyptian people had to pass before reaching their highest civilization. We knew, for example, that even as late as the Caesars, girls belonging to noble families at Thebes were consecrated to the service of Amon, and were thus licensed to a life of immorality, which, however, did not prevent them from making rich marriages when age obliged them to retire from office. Theban women were not the only people in the world to whom such licence was granted or imposed upon them by law; wherever in a civilized country we see a similar practice, we may recognize in it an ancient custom which in the course of centuries has degenerated into a religious observance. The institution of the women of Amon is a legacy from a time when the practice of polyandry obtained, and marriage did not yet exist. Age and maternity relieved them from this obligation, and preserved them from those incestuous connections of which we find examples in other races. A union of father and daughter, however, was perhaps not wholly forbidden,[*] and that of brother and sister seems to have been regarded as perfectly right and natural; the words brother and sister possessing in Egyptian love-songs the same significance as lover and mistress with us. * E. de Rouge held that Rameses II. married at least two of his daughters, Bint Anati and Honittui; Wiedemann admits that Psammetichus I. had in the same way taken to wife Nitocris, who had been born to him by the Theban princess Shapenuapit. The Achaemenidan kings did the same: Artaxerxes married two of his own daughters. Paternity was necessarily doubtful in a community of this kind, and hence the tie between fathers and children was slight; there being no family, in the sense in which we understand the word, except as it centred around the mother.