[Mithalwen]

My cpoy of the silmarillion isnt where i thought it was but I think Thorondor or one of the great eagles recovered his body after his fall and they built a cairn over him. I think Tolkien said that Elvish bodies decomposed in to dustnormally but I know that Miriel's body was preserved albeit in Vn Valinor and i imagine the stasis option is more likely than reembodiment in Valinor option. Gandalf seemingly was sent back to his body ... or at least that is the impression I got. Glorfindel hadel was slain did his time in Mandos and was sent back significantly later.

There is a description od a body lying like a cut flower on the grass but I forget if it was of Luthien or Iriel.
Haudh en Arwen was Finduilas IIRC. I think this might be worth a discussion in books or nn

There is an excellent RPG called Island of Sorrow which has a group of exiles visiting himring and unquiet spirits.

oh i am pondering the clues but nothing I am confident of vemturing yet.