Essais - Sur le vieillissement des Elfes

[Erendis]

J'ai beau retourner le texte du chapitre 4 partie 1 dans tous les sens, je n'arrive pas à m'expliquer ce qui m'apparait comme une contradiction énorme concernant la durée de gestation décrite.

(je donne ici le texte en affichant les diverses corrections)

D'un coté :

An elven-child was borne in its mother’s womb for about the same (relative) time as a mortal child, that is for about [9 months or ¾ of a löa > ¾ of a “youth-year” = ¾ of 12 löar = 9 löar ; [fn6 : Actually, a length of time = Mortal 96 months or 8 years.] - cf note 12] though in the Quendi this period was more variable, often being less, and on rare occasions being more. It is said that Feänor remained in the womb for one [year. > growth-year (12 löar). - cf note 13]

Une gestation relativement courte donc, de l'ordre de 1 à 8-9 années solaires

mais plus loin :

Thus we may observe that all matters of growth and development, which belong to the separate nature of the hröa, engaged in its own process of achieving its complete and mature form, and which are not under the will or conscious control of the fëa, proceed far slower among the Quendi than among Men. Gestation, therefore, proceeds according to the growth and ageing scale of the Quendi, and occupies [a whole yén, or 144 MY. > ¾ yên, or 108 MY. - cf note 18]

Une gestation de l'ordre du siècle !

Qq'un aurait-il compris la raison de cette différence entre ces 2 § ?