To walk in a straight line inside the Endless Hall was to make an assumption about the nature of space that the stones did not share.
In the mortal world that had drowned beneath the great deluge, six steps forward carried a man six steps further from his home. If he crossed six matching thresholds, he stood six chambers distant from his starting hearth. But in Entry hall 007—the sector known in Qiao Ming’s field ledger as the Folded Peristyle—shape obeyed the dense, curving mass of the Drowned Dao rather than ordinary flat earth.
Qiao Ming stood at the western portal of the peristyle, looking through an unbroken vista of half-round marble arches.
The floor was paved in eight-sided tiles of white Carrara marble alternating with small squares of dark green snake-like. Overhead, the groin vault was supported by paired columns of red stone whose polished surfaces caught the pale, watery twilight filtering from the clerestories. Everything appeared orderly, massive, and calm. Looking forward through the center line of the portals, one could see archway opening into archway, repeating into an apparent infinity of receding stone.
Yet Qiao Ming knew that infinity was an illusion born of human vision.
He knelt upon the threshold, setting down his reed basket. From his leather harness, he uncoiled the Knotted Horsehair Sounding Line.
At the base of the left portal door post, an ancient mooring ring of forged sea-bronze was anchored into the red stone base. It was thick as three fingers, green with powdery green rust, and worn smooth along its inner curve where moorings had rubbed against it in epochs. Just then, the hall was navigable by barge.
Qiao Ming passed the end of his sounding line through the bronze ring. With slow, practiced fingers, he tied a double fisherman’s knot, pulling the dark braid tight until the black horsehair and sea-silk bit into the bronze.
He stood, holding the coiled remainder of the sixty-fathom line loosely in his left hand. The heavy eight-sided lead line-weight remained nestled in its leather hip-frog, but the line trailed freely between his knuckles.
“Six portals,” he murmured, his voice sounding flat in the dry, enclosed air of the peristyle. “Six portals to complete the loop, and we shall see which hand holds the spear.”
He took his first step forward across the threshold.
His bare soles made a soft, dry whisper against the eight-sided tiles. As he walked, the trailing horsehair line whispered behind him, slithering over the stone like a thin black water-snake.
He passed beneath the second archway.
The stonework did not alter. The paired red stone columns stood at their appointed distances. The coffered ceiling displayed the same carved rosettes of eight petals. The scent of lime dust and faint salt remained constant. Yet with each stride, Qiao Ming felt a curious, subtle sensation of pressure behind the bridge of his nose. A delicate gravity tug that felt as though the floor were pitching downward at a barely noticeable angle, though his balance remained level.
He passed beneath the third archway.
Now the light began to bend. It wasn’t a violent distortion. It was the visual thickness of water seen through a thick crystal bottle. Looking forward through the leftover arches, the straight line of the walkway seemed to curve gently toward an invisible horizon that existed neither to the left nor to the right, but inward, toward the core of the stones.
He passed beneath the fourth archway.
The line paid out smoothly from his left hand. Ten deep-water lengths. Twelve deep-water lengths. The knots—single rods, double deep-water lengths—slipped over his palm with familiar rhythm. The air grew cooler, carrying a faint stone tang like fresh copper struck against flint.
He passed beneath the fifth archway.
Ahead lay the sixth and final portal. Beyond it, through the dark frame of the red stone jambs, opened a large, familiar chamber: the western portal where he had begun his journey scarcely five minutes before.
Qiao Ming did not break his stride. He crossed the threshold of the sixth arch and stepped into the room.
He stopped.
He stood in the center of the hall, the horsehair line trailing taut behind his heels.
He looked down at his feet. The line he had tied to the bronze ring on the western wall did not lead away behind him into the distance. It entered the chamber from the eastern archway opposite him, having described a closed, six-sided topological loop through space. Exactly eighteen deep-water lengths of braided horsehair connected the starting ring to his hand. But he had walked seventy paces in an unswerving cardinal direction.
This was the closed pipe hub of the peristyle. Yet the true mystery of the fold reached beyond simple closure. It lived in its chirality.
Qiao Ming turned his head to look at the statue standing beside the western wall.
It was the Sovereign of the Severed Spear—a thirty-foot figure of grey granite that guarded the entry threshold. When Qiao Ming had tied his line to the ring, the Sovereign had stood facing eastward, his right arm raised to brandish a broken spear-shaft. His left hand was held flat against his hip in a warding mudra.
Now, as Qiao Ming looked upon the statue, a cold, breathless wonder washed through his chest.
The Sovereign still held the spear, but he held it in his left hand. His right hand was now pressed against his hip. The drapery of his stone cloak, which had fallen in heavy folds over his left shoulder, was now draped over his right.
Even the scars in the granite were reversed: a deep fissure that had run down the left side of the statue’s jaw now ran down the right cheek.
The entire chamber had suffered a chiral inversion.
Space had not merely looped back upon itself. It had twisted along an internal axis, like a strip of parchment given a half-turn before its ends were glued together. In walking through the six portals, Qiao Ming had crossed through the spatial seam of the Drowned Dao, emerging into the mirror-state of his own starting point.
He knelt upon the floor, feeling the stone beneath his calloused soles.
The eight-sided tiles felt matching to the touch—cool, porous pale limestone—but when he ran his fingertips along the mortar seam of the nearest slab, the edge angled toward the left instead of the right. He drew a breath: the air smelled of the same lime and animal fat, but the draft from the high window row vents was moving south-to-north instead of north-to-south.
“A clean glow,” he whispered into the mirrored hall. “The fold has not frayed. The parity is preserved.”
He reached into his chest harness and withdrew the Folded brass star-compass.
To measure a chiral fold needed the star compass’s tertiary plate—the silvered mirror-rete etched with inverted sky map points. He unfolded the plate, held it level between his palms, and lined up the central sighting peg with the tip of the Sovereign’s reversed spear.
Inside the brass housing, the magnetic float did not point north. It spun in a slow, dizzying circle before settling upon the symbol of the Inverted Dipper—the sky-high marker that showed a negative spatial parity.
The readings confirmed the shape. The fold was stable, anchored by the huge spirit weight of the seven red stone columns that formed the six-sided outer edge.
To an uninitiated traveler, such a distortion would have been terrifying. A waking nightmare in which one’s own hands might seem alien and every familiar passage led only to an inverted glow of itself. Many who had wandered into the deep halls in ancient times had lost their minds here. They ran in wild circles through the six arches until dehydration or the rising tides claimed them.
But Qiao Ming felt only a deep, protective respect.
The fold was no trap. It served as an ancient safe hall seal. In the days of the Great Flooding, when the burning sky armies of the upper heavens had pursued the fleeing sovereigns into the deep vaults, this curving fold had swallowed entire legions. That turned their furious charges into endless, harmless circular parades until their spirit-cores exhausted themselves in the silence.
He stood, holding the taut horsehair line in his right hand.
To return the hall to its true chirality was simple: one had only to cross the six portals once more, reversing the loop. But before doing so, Qiao Ming drew his slate tablet and charcoal from his pouch.
He used his thumb as a guide. He sketched the reversed layout of the peristyle, recording the position of the Sovereign’s left-handed spear and the twelve-fathom chord of the loop. He noted the time by the shadows of the reversed red stone capitals, marking the entry in his journal under the title: The Seventh Hall at Low Slack: Parity and Glow.
When the sketch was completed, he dusted the charcoal dust from his knuckles.
“Thank you for guarding the loop, sovereign,” Qiao Ming said, bowing to the granite figure. “Your spear is as sharp in the left hand as it was in the right.”
He turned back toward the sixth archway, gathering the horsehair line hand-over-hand as he stepped through the threshold.
As he crossed the boundary, the subtle pressure behind his temples returned for three breaths, then released. He emerged on the other side. Then, the Sovereign of the Severed Spear was holding his weapon in his right hand once more, the bronze ring lay at his feet. The shadows of the hall had righted themselves under the quiet, unchanging ceiling of stone.