Leng is the only documented location that exists in two places at once. Central Asia, on conventional maps, in a region no expedition has returned from. And in the Dreamlands, in the cold waste north of Inquanok, on a plateau that experienced dreamers refuse to approach. Geographic surveys do not explain this. The Pnakotic Manuscripts do, insofar as anything in those fragments can be said to explain.

The Bureau classifies Leng as restricted not because the location is unmapped — though it is — but because mapping it produces inconsistent results. Two surveyors working from the same starting coordinates, on the same expedition, will produce charts that disagree on fundamental geography. The plateau is not stable. Or the surveyors are not, after they reach it. The distinction has practical consequences and the file has not resolved them.

The Overlap

Leng is not two places. Leng is one place with a weak barrier between dream and matter, and the practical consequence is that two routes converge there. A traveler in the Dreamlands can walk to Leng across the cold waste, past the onyx quarries the night-things work, into terrain where the stars are wrong even by Dreamlands standards. A climber from the Himalayan foothills can also walk to Leng, given time, supplies, and the wrong kind of luck.

Both routes terminate at the same monastery. Travelers from the dream side and travelers from the waking side have, on at least three documented occasions, encountered each other in the same courtyard. Neither party could explain how the other had arrived. Both parties were correct that the other should not have been possible.

This is the overlap. The Bureau does not have a working model for it. The working hypothesis is that Leng is older than the distinction between dream and matter, and that the distinction simply does not propagate into its geometry.

The Yellow Monastery

Pre-human architecture. The masonry techniques have no analog in any known human culture, and the stone itself has been dated — by one of the few researchers who returned with samples — to a period before the current configuration of continents. The monastery has been there since before there were continents in their current arrangement. It does not appear in any geological survey because it is not, in the strictest sense, situated on geology that admits of survey.

The monks wear yellow silken robes and broad-brimmed hats. Witnesses consistently refuse to describe their faces. Not "cannot describe" — refuse. Pressed for detail, the witnesses change the subject, become hostile, or weep. The Bureau has stopped asking. The robes are loose enough to disguise the proportions of whatever wears them, and the proportions are the wrong ones.

They are not monks. They are wearing the shape of monks because the shape is convenient. What they actually are is a question the file is not equipped to answer.

The Abbot

The High Priest Not to Be Described sits at the center of the monastery in a chamber of carved onyx, alone except during ceremonies. The name given to him by the other monks translates approximately to "he who waits for the transmission to complete." What is being transmitted, and to whom, the file does not know. Participants in his rites do not leave the monastery. The handful of accounts that exist come from travelers who passed through the outer halls and saw enough to inform the report before the experience compromised them.

The Abbot's hands are wrong. Every account agrees on this. Beyond that, agreement breaks down.

Threat Profile

Leng is marked restricted because travelers who reach it do not come back as themselves. The ones who return are fluent in languages they never learned, reference events they could not have witnessed, and are gone from the Bureau's records within months — not deceased, in most cases, but gradually replaced. Family members report a man who looks correct, sounds correct, and is not the same person. Fingerprints match. Dental records match. The replacement is complete enough that conventional identification fails.

The pattern is consistent with the methodology documented for The Great Race of Yith, which suggests Leng functions as a transfer point. Whether the Yithians built the monastery, occupied it, or simply use it, the file cannot determine. The 1935 expedition was the last sanctioned approach. Two members reached the plateau. Neither came back wearing their own minds. The investigation into their replacements was closed at O̓J̶Q̄͛Ť́͠ȂR̋͂́A̐͡F̓̏͋A͑̓ͅF̒͛͢Ȇ on the recommendation of the section chief, who has since taken early retirement.