Don't think anyone mentioned Tuor and his harp.
In UT he plays his harp and sings up on a mountain, where he's hiding from his enemies. Heedless of the danger, he loses himself in the music and a stream bubbles up beneath his feet, rushing down the hill. He (correctly) takes this as a sign and it leads him to the gate of noldor, and eventually to Vinyamar and Ulmo.
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