
Yes, they are still mortal. They can be healed of all their hurts and weariness (this goes for Frodo especially) and enjoy the Undying Lands, but they still die when it's their time. So I have been wondering if Frodo was still alive when Sam came... maybe they met again, but maybe Frodo had already died. That would be kinda sad![]()
And much later, in a draft letter of 1963 (Letters no. 246), he [Tolkien] wrote:
'Frodo was sent or allowed to pass over Sea to heal him -- if that could be done, before he died. He would have eventually to 'pass away': no mortal could, or can, abide for ever on earth, or within Time. So he went both to a purgatory and to a reward, for a while: a period of reflection and peace and a gaining of a truer understanding of his position in littleness and in greatness, spent still in Time amid the natural beauty of 'Arda Unmarred', the Earth unspoiled by evil.'
Tolkien speaking to exceptions doesn't topple the rule for me -- I think there is plenty of evidence (even if story-external) that mortals do not normally become 'immortal' in the West, a major point of the Numenorean story I would say.
'Tuor weds Idril the daughter of Turgon king of Gondolin; and 'it is supposed' (not stated) that he as an unique exception receives the Elvish limited 'immortality' (...) Immortality and Mortality being the special gifts of God to the Eruhini (in whose conception and creation the Valar had no part at all) it must be assumed that no alteration of their fundamental kind could be affected by the Valar even in one case: the cases of Luthien (and Tuor) and the position of their descendants was a direct act of God.'