Missing verse; help me here

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While reading Unfinished Tales I came upon this poem that deals with relation of the Valar to Middle-earth in the Third Age(a topic I'm very curious about). However it terminates at the middle, with a note from Christopher Tolkien.

Will thou learn the lore / that was long secret
of the Five that came / from a far country?
One only returned. / Others never again
under Men's dominion / Middle-earth shall seek
until Dagor Dagorath / and the Doom cometh.
How hast thou heard it: / the hidden counsel of the Lord of the West / in the land of Aman?
The long roads are lost / that led thither,
and to mortal Men / Manwë speaks not.
From the West–that–was / a wind bore it
to the sleeper's ear, / in the silences
under night-shadow, / when news is brought
from lands forgotten / and lost ages
over seas of years / to the searching thought.
Not all are forgotten / by the Elder King.
Sauron he saw / at a slow menace ....

There is much here that bears on the larger question of the concern of Manwë and the Valar with the fate of Middle-earth after the Downfall of Númenor, which must fall quite outside the scope of this book.From Unfinished Tales Part Four: II The Istari

I've combed the HoME series for this poem but can't find it anywhere. Can any of the uber-fans here help me find the missing lines of the verse?