Auden was frequently plagued by nightmares of a Great Wave rolling in over the meadows and trees.

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And it seems that one of Tolkien's sons "inherited" this dream.

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It was a dream that Tolkien later handed to Faramir, who spoke in The Lord of the Rings text about having dreamt of a Great Wave.

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This son, who subsequently ascended to the throne of Arnor, was ultimately Aragorn's ancestor. But the name of this son was Valandil.

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Valandil, Isildur's companion, is a show-specific creation.

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It's possible that this is some kind of cryptic allusion to Adar's true identity because the river itself appears in a number of The Silmarillion stories.

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Some have claimed that Adar is actually Maglor, the only one of Fanor's seven sons whose ultimate fate is determined.

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He once had a conversation with Elrond's father, who warned him that Elrond would eventually control his future.

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It is believed that Durin (Owain Arthur) is currently employed in the defunct mine "beneath the Mirrormere" in Khazad-dûm.

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In The Lord of the Rings, The Mirrormere held great significance for the dwarves.

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