Feanor's presence in Cirith Ungol

[Angry Hill Troll]

is the Phial Galadriel's 'Silmaril'- making her equivalent to Feanor in a way.

Sort of, but really it's more the converse. Quote from UT

the Eldar said that the light of the Two Trees, Laurelin and Telperion, had been snared in her tresses. Many thought that this saying first gave to Fëanor the thought of imprisoning and blending the light of the Trees that later took shape in his hands as the Silmarils. For Fëanor beheld the hair of Galadriel with wonder and delight. He begged three times for a tress, but Galadriel would not give him even one hair. These two kinfolk, the greatest of the Eldar in Valinor, were unfriends for ever.

Hmmm, was the phial filled with water from the last time Galadriel washed her hair? [img]smilies/eek.gif[/img]

Certainly there are a lot of references to the Silmarils here:

-Shelob (Ungoliant's offspring)
-The mission to defeat Sauron (Morgoth's ex-protege)
-Galadriel's phial
-Sam and Frodo recounting Lúthien and Beren's quest
-Sam seeing the Star (Eärendil?)

I don't think Fëanor was really there in spirit, though if he heard about it later in Mandos, he probably would have been happy, not being himself a big fan of either Dark Lords or spiders. Well, maybe he would have been a bit chagrined at Gimli getting a lock of Galadriel's hair "What?! She gave a lock of hair to a dwarf but not her own uncle!" [img]smilies/rolleyes.gif[/img]