Unpublished Material

[Tar Elenion]

From the TG link:
Concerning ... 'The Hoard'

A transcription is or has been online. Not official published, though.

Elvish time (partially published)

Isn't this in NoMe 1 XXI

Essay, written in response to seeing Pauline Baynes's depiction...

Also in NoMe 2 VI, though, I think, in an edited (by CFH) form (as Tolkien was 'wrathful' in some of his commentary, see BoLT 2).

Númenórean religion

Maybe this will come in the expanded Letters later this year. Or one can hope.

[Aiwendil]

Originally Posted by Tar Elenion

Elvish time (partially published)

Isn't this in NoMe 1 XXI

Essay, written in response to seeing Pauline Baynes's depiction...

Also in NoMe 2 VI, though, I think, in an edited (by CFH) form (as Tolkien was 'wrathful' in some of his commentary, see BoLT 2).

I think you're right on both of these, though I don't have NoMe on hand at the moment. That's the danger of Wikis - updates tend to be inconsistent.