[Galin]

Hmm, still, we read in Morgoth's Ring...

'But in Aman, since its blessing descended upon the hroar of the Eldar, as upon all other bodies, the hroar aged only apace with the fear, and the Eldar that remained in the Blessed Realm endured in full maturity and in undimmed power of body and spirit conjoined for ages beyound our mortal comprehension.'

This description is in contrast (note how it begins 'But in Aman...') to what came immediately before it in the essay titled Aman (see Myths Transformed text XI) -- and what came before it is a description of the slow fading of the Elves in Middle-earth.