Do mortals die in the undying lands? nice question! I always thought YES but now I'm not sure.
Christopher Tolkien has divulged some of his father’s letters and they said this:
"the mythical idea underlying is that for mortals, since their ‘kind’ cannot be changed for ever, is strictly only a temporary reward: a healing and redress of suffering. They cannot abide for ever, and though they cannot return to mortal earth, they can and will ‘die’ of free will, and leave the world.”
SO....they have lived longer, not forever! OR NOT? perhaps there is no one right answer .___.
I want to resurrect Tolkien to have a CLEAR ANSWER XD