The Three Echoes

The south gallery began behind a basalt portal whose gands had recently been greased. Zaelyra noticed it. The register, on the other hand, said that no one had been there for three weeks.

Rhylor put his palm on the stone. "Someone is lying in the accounts."

"Is this an accusation?"

"It's an observation. The charges are waiting for a way out."

They advanced with two lamps covered. The first corridor descended gently, then divided into three branches. Each branch sent back the noise with a slight delay. That's why cartographers called it the Three Echoes: not for its beauty, but because you could lose your group by following a voice that seemed to come from the wrong side.

Zaelyra began by counting the steps. At fifty, she put a discreet mark at the foot of the wall. At one hundred, she measured the height of the vault with a foldable rod. The numbers did not correspond to the plan. The gallery should have gone up; it kept going down.

"The official statement is false," she says.

"Or old," replied Rhylor.

"Twenty years do not change the inclination of a corridor."

"The maps, yes."

At the first bifurcation, she placed the marbles one by one at the threshold of each branch and let them roll in the dark. In the first, the sound of the metal moved away until it disappeared. In the second, the echo came back to him after four beats. In the third, the rolling was stopped; a moment later, a brief sound rose from under their feet.

"There is a hidden slope on the third."

"How can you be sure?"

"I'm not. The ball only tells me what she met."

Rhylor handed him a second marble. "So check."

She started again with a heavier stone. It followed the same road, then disappeared into a crack. A moment later, a light sound came up from the passage, three unequal notes.

"A cavity underneath," she whispered.

"Or a bell."

Zaelyra marked the choice on her notebook and left the third branch aside. The gesture cost him. Every ignored detour could contain the answer, but exploration was not a race to discover. It was also necessary to keep a return road.

At the second bifurcation, she asked Rhylor to move twenty steps away and pronounce his name. The echo came back from the wrong gallery.

"How did the teams not get lost? She asked.

"They learned to recognize the sounds they produced themselves."

"What if the sound was imitated?"

"So they didn't move forward."

"This is a slow method."

"She lets more people come back."

At the next bifurcation, the sound of a drop came to them from the right passage. A second drop fell almost immediately, then a third, at regular intervals.

Zaelyra put her palm against the wall. The rock vibrated very slightly.

"Water behind the wall."

"Did you hear her?" asked Rhylor.

"I felt it."

She taped her finger three times. The wall returned two dry sounds and a third, more dull. A cavity was behind the lower part, but the space seemed filled with rubble.

Rhylor handed him a tip of metal. "Check before you dig."

Zaelyra scratched the stone at the level of the matte sound. A thin white powder was detached. Under the black deposit, an engraving ran horizontally, then stopped at the edge of a crack.

"It's a level limit," she says. "The passage was drowned."

"Or he still is."

She consulted her map. The old line continued straight ahead. The new statement should show the stop, but marking it as a dead end could lead someone to engage in it without a rope.

Zaelyra drew the wall, the crack and the watermark. She added: do not open without checking the upstream level.

" Are you really going to write that?" asked Rhylor.

"Someone else will come here. He won't need to repeat our mistake."

"We haven't made a mistake yet."

"Then it will be easier to avoid."

He let out a breath that could have been a laugh. "You start talking like a cartographer."

"I thought I was one."

"You drew paths. It's not quite the same."

Further on, the gallery tightened until it left only a strip of stone between the wall and a vertical well. Zaelyra attached a small measuring bell to it, then took a step aside. The sound came back three times: first from the front, then from behind, finally from a point under their feet.

"There is a room below," she says.

"Or an opening that returns the sound," Rhylor replied.

She uncoiled her copper wire and fixed the bell on it. The wire sank into a slit at the base of the wall, then got stuck after two arms in length. It was not enough to reach the room, but enough to prove that it was not in the main gallery.

Zaelyra drew a small cut of the well, with the slit and the measured depth. For the first time, she understood why the old surveys used several views of the same place. A line could tell where to go; a cut said what was waiting underfoot.

"You're going to put this room on the statement?" asked Rhylor.

"I'll put what I know."

"Even if it allows someone to enter it?"

"If I don't write it down, someone will fall for it."

Rhylor did not answer. She wrote the warning in the margin, without tracing a passage down.

Zaelyra marked the pillars with chalk. Rhylor checked the recesses, looking for trigger wires. He did not explain his actions. She had learned to read her silences as another form of map.

At the first crossroads, she compared the wall to her survey. An old line continued under a layer of black lime. Someone had tried to make it disappear, but the stone kept a clearer scar.

"This gallery is not closed," she says.

"She's supposed to be."

"It's not the same."

A dull rumble passed under their feet. Dust fell from the ceiling. Rhylor raised his fist. They waited. Further on, something scraped the stone, three times, then stopped.

"A guard? "Zaelyra whispered.

"A guard would have liked to be heard."

She looked at the ground. In the dust, fine traces went towards the third branch. Not boots. A narrow sleigh, pulled by hand.

"Someone is carrying loads here."

Rhylor did not answer. He crouched near a groove and passed his thumb over a shard of turquoise stone. The same tone as the thread hidden in Zaelyra's sleeve.

She didn't take it out. A color could connect two traces without revealing who had left them.

At the end of the passage, a small recess had been set up behind a mobile slab. It contained two empty gourds, rolled blankets and a box of chalk. Not a den. A stopove prepared for travelers who did not want to be seen.

At the threshold, a turquoise wire had been tied to a roughness of the stone. He was cut straight, as if someone had left him there without wanting him to obstruct the passage. Zaelyra thought about the thread found under the door of the annex, then remembered that a color was not enough to prove a common origin.

Zaelyra examined the blankets. One was too small for an adult. The other had a stain of dried blood.

"Who's passing by here?"

"People who don't have permission," Rhylor replied.

"And who arranged the stop?"

He pulled out of his pocket an old copper plate, tarnished, engraved with the open circle. "This sign used to mark rescue teams. The open side indicated that you could ask for help without presenting a house seal."

"Did you work there?"

"A few times. Rhylor turned the plate between his fingers. "We brought a rope, water and a guide. We did not ask the names of those who were pulled from the rubble."

"Why did you stop?"

"The Houses ended up demanding a report for each rescue. Who had asked for it, who had paid for it, to whom the survivors returned. The circle did not answer any of these questions. He put away the plate. "The teams are gone. The sign has been transmitted."

"Did you keep it to remember them?"

"I kept it because a useful sign does not need to remain with those who created it."

An echo came to them from the opposite branch: a metallic rattle, then a voice that said an indistinct word. Rhylor turned off his lamp. In the dark, he grabbed Zaelyra's wrist and pulled her behind the slab.

Steps approached. Two people, maybe three. They did not wear armor; their steps were too light. One stopped at the entrance of the recess.

"The mark has been left? "Blowed a voice.

"Yes. But not for us."

"So who?"

The silence stretched.

"The one who wants to know who passes."

The steps left without entering.

Rhylor stood still, his hand raised. In the Three Echoes, a step could come back from a gallery where no one was anymore. He waited for the last noise to be lost in the runoff, then turned his lamp back on. Zaelyra didn't ask him who they had just heard. He may not have been able to tell him.

She took back her notebook. She did not notice the gourds or the blankets, and did not give a name to those who could have slept there. On the statement intended for the House, she did not mark the shelter. In her private map, she only traced the approach and placed the open circle at the stopping point, without drawing the slab or the recess. Next to it, she added: do not move without a guide. She left a white margin around the sign. For the first time, she did not take it for a gap. An attentive cartographer could understand that a refuge existed; the official copy would not deliver his address.

When they resumed walking, Rhylor let him choose the line that bypassed the stop. The passage brought them back to the third branch, where the rumble of a current gradually covered the echoes.