Samuel Taylor Coleridge

See here for a brief introduction to the Gateau Method.

In autumn 1797, Samuel Taylor Coleridge awoke from an opium-induced slumber to pen his famous poem Kubla Khan, or a Vision in a Dream:

In Xanadu did Kubla Khan
A stately pleasure-dome decree:
Where Alph, the sacred river, ran
Through caverns measureless to man
Down to a sunless sea.

Unfortunately, as Coleridge penned the poem’s fifty-fourth line, he was interrupted by an unwanted visit from an unnamed person from Porlock, a village on the nearby Somerset coast. All sorts of conjectural identities have been assigned to the enigmatic visitor from Porlock; whomever they may have been, they rapidly became a literary trope.

But what if the Person wasn’t really a person at all? What if they were some sort of supernatural mercenary, taking payment in order to stalk the brilliant and disrupt their thoughts before they can even fully form. Perhaps Doc Brown isn’t absent-minded at all—he’s just the victim of repeated attacks from this preternatural predator.

So who sent the Person? Someone from the government, desperate to keep state secrets under raps? The K’n-yanis, hoping to keep the surface peoples’ technology in check? Or maybe even Brown himself, aware that his inventions could do terrible harm in the wrong hands?

How do the PCs contact the Person to call off the attacks? And what sort of payment does he, she or it demand?