From another website addressing the "Tresco Manuscript":
Quote:
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New Middle-earth is a secondary, sub-created world. To all intents and purposes it is identical to the primary world we all inhabit, with one important exception: within it the Middle-earth related by the late Professor JRR Tolkien in The Lord of the Rings is not fiction, but historically true.
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The "Tresco Manuscript" is part of an intellectual exercise attempting to extrapolate a post-Third Age "history" under the basic assumption that Tolkien was a translator, not an author of fiction. Nonetheless, it is a work of "sub-creation" or fiction.