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Chapter 8

The Zero Point

5,675 words · 24 min read

She had been down here since twenty to ten on the first of August, a Friday, sitting on the floor behind the gas cabinets with her knees up. The guard upstairs had ticked her name on the day list with a green Reynolds pen, on a printed sheet clipped to his tablet, because the tablet, he told her, had been hanging since the monsoon came, and paper did not hang. Nayagiri, A. 21:40. She had held up the spectrum analyser in its grey case like a ticket, and he had nodded at it with the polite indifference of a man who had been shown a great many instruments and never once been told what any of them were for.

"Late, madam."

"Noise floor," she had said. "Line three. It's always worse at night."

"Everything is worse at night," the guard said, and pressed the call plate for her, and the steel doors had closed on his safari suit and his green pen and his list.

That was five and a half hours ago.

Behind the cabinets, where Nag had shown her the neat stainless pipework on her first Thursday, there was a gap of sixty centimetres between the steel backs and the black paint: the only place in the Sanctum no camera looked at directly. She had checked it from upstairs on a floor plan she was not supposed to have, and again on her knees, pretending to trace a cable. Now she sat in it with a steel flask of coffee from the pantry, and the cold came up through the floor into the bones of her hips.

The pulse tube beat on through the plinth. Chuff. A pause. Thump. Not quite once a second. She had stopped hearing it by eleven. By midnight she had started hearing it again, because there was nothing else, and then she could not stop.

Her phone had no signal at SL-5. It had Vikram's script on it, in a folder she had named tax_2024, and at half past twelve, because the alternative was thinking, she opened the README and read it for the fourth time.

Step 1: run replay.sh at T-minus 10. cameras loop last clean 20 min. Step 2: run logshim.sh. it eats the scheduler writes and hands the logger yesterday. Step 3: do the thing. Step 4: do not get caught. Step 5: if caught, you don't know me. you have never met me. I am a stranger who fixed your wifi once. Step 6: if caught by Amma, tell her it was me. she'll believe it.

She laughed, a short ugly snort into her knees, and clapped a hand over her mouth. Nobody came round the curve of the corridor. She was still grinning at a text file, five levels under a city that was asleep, and for a minute she missed her brother so much it felt like the cold.

Then she put the phone face down on the floor.

The quarters were back up the corridor, past the lift lobby. Two of the four rooms had been lit when she came down. At a quarter to eleven she had heard a door, water running, and a man's voice on a phone, low, in Telugu: Haa, ammā. Tinnānu. Haa. Paḍukuṇṭānu. Yes, I ate. Yes, I'll sleep. Then a bhajan, tinny, from earphones. She had not known which technician was on campaign with Nag this week. She knew now that he called his mother at night, which was more than she had done.

At ten past one he began to snore under the bhajan: long, uneven, complicated ropes of sound, with gaps she kept expecting to be the end and a honk at the close of each one, like a Tata Sumo reversing. She listened to it, grateful for every beat that came at the wrong time.

Nag did not snore.

She heard Nag at 02:17. No door, no water, no voice. Only footsteps on the black floor of the corridor, coming round the curve toward the consoles, and it took her four steps to understand what was wrong with them.

They landed on the pulse tube. Thump, and a footfall. Thump, and a footfall. Not near it, not roughly with it. On it. She pressed her back into the paint and held the flask against her chest and counted, and he came eleven steps round the curve and every one of them fell inside the beat of a machine he could not possibly be listening to, and when he stopped, he stopped on a thump.

He was at the logbook. She could see a slice of him through the gap between the second and third cabinet: the Quantace polo, a sleeve, the cheap Casio. He did not turn on the stand lamp. He opened the register in the dark, uncapped his biro and wrote. She could hear the pen. It moved at one speed, without the little stops and rushes of a hand that is thinking, a sound like a sewing machine a long way off. He wrote for as long as it takes to write a line. He capped the pen. He looked up at the white office clock above the consoles, with its red second hand, and then at his wrist.

Then he looked, for a long moment, at the gas cabinets.

She thought, absurdly, that she should have worn a darker kurta. She thought that if he came round the end of the row she would say noise floor, line three, and he would say madam in his pleasant voice, and that would be the end of the job and the grant and the whole idea of herself she had carried into this building like a tiffin carrier held level on a bus.

Nag turned and walked back up the curve. His steps landed on the beat all the way to the quarters. A door closed, softly. Round the curve, the other man snored on, sloppy and alive.

She did not move until twenty to three. Then she stood, knees cracking, and went to look at what he had written.

03:17. MXC 9.0 mK. All nominal. N.V.

She read it three times before she saw it. He had written it at 02:17. Three seventeen was the run_at line in her config, saved on Nanna's desk in Tarnaka and told to no one, and he had logged it an hour early, as if he had already been there and it had gone fine.

She made herself test it. Her job sat in the scheduler queue on console three, ARMED, for anyone who woke the screen; he might have read it there. She told herself he had, and that he was covering for her, or setting her up. Neither explained the pen that never paused, or why a man would write down a temperature for a moment that had not happened yet. She went back behind the cabinets and did not believe herself, and at 03:07 she ran Vikram's first script, and at 03:08 the second.

On forty-three the night shift was three people and a packet of Karachi biscuits. Vikram had the building's camera wall on his second screen, because nobody else looked at it after two.

The SL-5 tile blinked. Nothing in it moved; that was what caught him. The timestamp in its corner went back twenty minutes and started again, and the frame-hash column flicked amber and then green, the way it did when a replay matched its own seams. He knew those seams. He had written them on a Sunday afternoon to win a bet with Karthik.

"Akka," he said, under his breath. "Ayyo. No."

The alert sat in his queue, waiting for a disposition. He looked at it a long time. Then he typed sensor jitter, known issue, closed, ate a biscuit he did not want, and did not look at SL-5 again until the end of the shift.

At 03:15 she came out from behind the cabinets, sat down at console three.

She knew its four screens from upstairs, through the remote, as a window on a laptop. Down here they were the only light in a round black room. Left, the readout chains, eleven hundred and eight little traces in a scrolling wall. Centre, the decoder's syndrome view, the three-dimensional graph the Core team called the aquarium: the chip's checks laid flat as a grid and stacked upward, round after round of error correction, so that time ran up the screen like a tower being built. Every detection event was a dot in it. On a good night the aquarium was a pale cloud of dots drifting upward, the ordinary snow of a quantum computer doing its honest best. Right, the coherence monitor. And below them, small, on the fourth screen, the scheduler, with her job at the top of the queue.

NSD_7v_trst run_at 03:17 owner: anayagiri status: ARMED

Console two, the fridge monitor, was two metres to her left. MXC 9.0 mK. Still 0.81 K. Flux-bias magnet: 4.02 A, setpoint, green. Circulation nominal, condensing pressure green.

She poured the last of the coffee into the flask's steel cap and put it down beside the keyboard.

Through the windows in the gold shields the stages of the Core hung one below the next, tapering down into the cold. The pendant lay against her collarbone under the kurta. It was cool. She checked. She had not known she was going to check.

"Just once," she said to the Core, very quietly. "Don't wither. Bloom."

It was what Ajji had said to the tulsi on the Vidyanagar balcony every April, when the heat came and the leaves went brown at the edges, and it had not worked on the tulsi either.

The clock's red hand came round.

At 03:17:00 the scheduler said RUNNING, and for eleven seconds the aquarium kept its snow. Then the first line of the hymn went into the drive lines, the pulses spaced to the light and heavy syllables she had first marked at fifteen, and again at Nanna's desk in July, and the snow in the aquarium began to move.

It did not thin. It drew.

The dots were still being laid down round by round, still rising up the screen, but they were no longer scattered. They lay along lines. Four points, six edges, four faces, turning slowly in the rising graph as each round of checks was stacked on the last. A tetrahedron. Drawn in errors, in the space-time of the chip, in the one place on this machine a picture could possibly be drawn.

Through the floor came a sound.

It was lower than the pulse tube, a single long note she felt in her back teeth before she heard it. She had heard one once, in a basement at IIIT, when a postdoc ramped a magnet too fast: a superconducting coil sings when its current changes, the windings shifting against each other by a hair. On console two the flux-bias current had moved, 4.02 to 4.05, and the note came up through the plinth and the floor plates and the legs of her chair, and in the steel cap beside the keyboard the coffee shivered into rings.

Thrum.

The tetrahedron came apart and the dots found new lines. Twelve vertices. Twenty faces. An icosahedron, convex and bright, rising and turning. The flux current stepped again. 4.09. The note went up a little. The rings in the coffee came closer together and faster.

Thrum.

The icosahedron folded. Its faces pushed inward, each point of it drawn out into a spike, so that the shape turned itself inside out into a star. The number of dots per round was falling. She watched the counter under the aquarium. Five million a second. Nine hundred thousand. Sixty thousand.

Thrum.

And then there were no lines at all, because the dots had arranged themselves into a surface with no edges, and the surface was a sphere, and the sphere was growing fainter, and the counter said eleven, and four, and then it said zero and stayed there.

A syndrome buffer does not empty. Even the best qubits in the world make a mistake somewhere in a thousand operations, and a machine this size does hundreds of millions of operations a second, so the decoder is always eating. On the best night the Core had ever had there had been three million detection events a second. The aquarium was supposed to snow, every flake one of Srinivas's flags, so that the decoder could look at the snow and work out, round by round, what had gone wrong. A page of a billion words with not one underline did not mean the spellchecker had broken. It meant no letter had been wrong, and in real hardware letters were always wrong, unless something was choosing them.

The aquarium was empty. Rounds were still being laid down, the grid ticking upward, clean, clean, clean, with nothing in them.

She pulled the coherence monitor across to the centre screen. Eleven hundred and eight T₂ estimates, the time each qubit could hold its phase before the world got in. They were climbing in a long even ramp, the fit line on each one gone flat, and the fitting software, which did not know how to report a coherence time longer than its own measurement window, had begun putting a small grey > in front of every number.

Gate fidelities: the monitor rounded to four places. It said 1.0000, eleven hundred and eight times.

She had seen T₁ of forty milliseconds on Bindu on the twenty-fourth of July and had told herself for a week afterwards that it was a bad cable. This was the Core. There was no cable bad enough.

She thought the decoder has crashed, and checked; it was running, simply being given nothing. She thought the readout is dead, and checked; every chain was alive, every qubit reporting in. Nothing had failed. It was as if every mistake the chip might have made had been found in advance, somewhere, by something, and quietly declined.

The coffee in the cap was ringing, and the pulse tube beat underneath it all, and Ananya sat in front of four screens at twenty-one minutes past three in the morning with tears running down her face and no idea when they had started.

The fourth verse was going into the lines now. kāmas tad agre sam avartatādhi. Desire came first. She had marked it light, heavy, heavy, light, on a page of her teenage notebook with a Magadheera sticker on the cover.

And through the lowest window in the gold shields, where nothing was supposed to be visible at all, there was a light.

Sharath had not slept. He sat in the penthouse with the lights off and the graphacer warm behind his right ear, and the window glass gave him SL-5 as the building knew it. Not pictures; the pictures were twenty minutes stale, and he had let them be. The pulse tube's load. The lift's floor log. The line currents. A job header he had read at ten past nine: NSD_7v_trst run_at 03:17.

He had watched the detection count fall from millions to zero and had not moved. He had watched it stay there. Then the window drew the flux-bias current as a thin blue line, and the line left its setpoint and began to climb with nobody commanding it, and he stood and put on his jacket.

In the private lift, going down, he said, "Not yet, ra," to no one.

It was very faint: a pale smudge where the mixing chamber plate would be, no bigger than a lemon. She looked away and back, and it was still there.

She looked at console two.

MXC 9.4 mK.

Nine point four was nothing. Nine point four was a truck on the Outer Ring Road. She watched it, and it said 9.9, and 11, and 14.

The sphere in the aquarium had not collapsed. It was the one thing on the screen, a faint globe drawn in no errors at all, and it was getting bigger. As it grew, the note from the magnet climbed. On console two the flux-bias current was 4.31 A, and 4.48, and 4.70, and the setpoint beside it still said 4.02 in patient green, and nobody had touched it. The current was climbing as if the array itself had reached up the bias lines and taken hold of the loop and started to pull.

MXC 30 mK. 52. The still went from 0.81 K to 0.9 and then 1.1. The mixture could not carry heat away that fast. Nothing could.

In the lowest window the light had grown to the size of a fist.

In Tarnaka, Krishna woke because the house was talking.

It came from the pūjā room, Lakshmi's voice, low and very fast: Ajji's hymn of the beginning, the one Annu used to mark in pencil. kāmas tad agre sam avartatādhi. He got himself into the chair and wheeled to the door his chair could not get over.

She knelt with her back to him, quite straight, and her breath did not catch where it always caught.

"Lakshmi."

She turned her head and looked at him with polite attention, as at a man who had come to the wrong house, and went on.

The heat, he told himself, and the tablets; the doctor had said the tablets could do this. He went to the kitchen for the second one and stood a long time with it in his palm before he took it to her.

"No," Ananya said. "No, no. Bas. Enough."

She hit abort on the scheduler with her open palm. It went ABORTING and then ABORTED and the drive lines went quiet. The flux current did not care. It was at 5.2, and there was nowhere it could be getting it from. The magnet's note had become a high thin whine that came through the floor into the soles of her feet, and under it, from the far wall, came a sound she had never heard before, a hard metallic tick, and another, the pressure gauges on the gas cabinets straining against their stops.

She got up and went to look. The helium return gauge was a big dial with a red band at the top, and the needle was in the band and moving. On the steel beside it was a small yellow sticker. BURST DISC. DO NOT STAND IN FRONT.

MXC 180 mK. Flux-bias 6.1 A.

She ran.

The fourth console was set apart, beside the plaque, and her body had kept Nag's words from her first Thursday. She flipped up the clear cover, pushed her thumb through the red seal until the tab snapped, and closed her hand on the lever, which was colder and heavier than it looked, and the pendant under her kurta was warm now, warm as a cup of chai held too long, and she began to pull.

"Don't."

The word came quietly, from behind her, from the mouth of the corridor, in the voice of a man pointing out a typo.

She turned with her hand still on the lever.

Dr. Sharath Jai Shetty stood at the edge of the console light. Charcoal suit, no tie, the collar open. She had not heard the lift over the magnet. He walked across the black floor without hurrying, looking past her at console two, and when he was close enough to read the numbers she saw his lips move, doing a sum.

"You haven't announced," he said.

"Sir, it's running away, the MXC's at two hundred, the helium—"

"I know where the needle is. I'm telling you what you've done. Plaque, step one. Announce. You broke the seal without saying a word, because if you'd said a word you'd have had to say it to someone." He glanced at the plaque and back. "Step two, you haven't looked at the oxygen monitors. Step three, the exhaust dampers are shut. I can hear that they're shut. Step four is where your hand is."

"If I don't dump the magnet—"

"Look at the current."

She looked. 6.8 A.

"Now look at the plate on the dump resistor. It's on the cabinet behind you. Brass. Stamped."

She did not have to look. She read every label in every lab. "Rated for five."

"Rated for five." He nodded, as if she had got a viva question right.

E = ½ L I² [Energy goes with the square of the current. At 6.8 amps the magnet held nearly three times what it held at setpoint, and almost twice what the resistor was rated to swallow.]

"Dump the magnet now and the resistor won't take it," he said. "It quenches. Everything it holds goes into the cold stages at once, the mixture flashes back into those cabinets on top of the recovery store, and the discs go. Every litre of helium on this level in the air of one room, Doctor, with the dampers shut. You'll feel fine right up until you're on the floor. And if it quenches on its own, we're in the same room anyway."

She stood with her hand on the lever.

"And you'd walk out, probably," he said. "You're next to the corridor. You're young. The lift takes forty seconds to come down and the plaque tells you not to wait for it, so you'd go up the emergency stair, five levels of it, and at about the second landing you'd remember." He tipped his head toward the curve of the corridor, toward the quarters. "Bhaskar has a mother in Nalgonda. She likes him to call before he sleeps."

Round the curve, faint under the scream of the magnet, the snoring went on. Long, uneven, and alive.

Ananya took her hand off the lever slowly, as if it might follow her.

"Then what," she said.

"It isn't heat," Sharath said. "Not first. Heat's what it's making. Look at the aquarium."

He was already at console one, pulling his jacket off one arm, and she went back to three because he pointed. The sphere in the empty aquarium filled half the screen now, a clean globe drawn in nothing, and it was pulsing. It swelled and eased, swelled and eased. The magnet's note rose and fell with it.

"The array's in one mode," he said. "All of it. Eleven hundred qubits doing one thing, very coherently, and the one thing couples into the bias loop. Every swell, it pushes current into the magnet. The magnet stores it. You can't stop that with a switch. You'd be pulling the handbrake on a train." He typed fast. "So we don't stop it. We cancel it. I drive the bias trim and the global drive amplitude from here. You take the drive-line phase on three. We put in the same mode, opposite sign, and it has nothing to push against."

"It won't lock," she said. "It's not periodic. I built it not to be periodic. That was the whole point, you can't phase-lock a counter-pulse to something that doesn't—"

"I can't," Sharath said. "You can."

She looked at him. He did not look back. He was watching the current.

"It's still running your hymn," he said. "You aborted the drive and it kept the meter. Look at the pulsing. Long, long, short, long. It's gone back round to the second verse. It's dancing to your tune, Doctor, and you're the only person in this building who knows where the tune goes next. Take the phase."

She took the phase.

Console three had a physical fader for the drive-line phase, a grey box with a knurled knob, because Deshpande did not trust a mouse in an emergency. Ananya put her fingers on the knob and tried to calculate the next swell and the one after, and the numbers slid off each other. Too many terms.

She stopped calculating.

She shut her eyes for one breath, and the verse came up in Ajji's voice, from the Vidyanagar table, with the fan turning and the jasmine buds going two by two onto the thread.

ānīd avātaṃ svadhayā tad ekaṃ.

That One breathed, windless, by its own nature. Heavy, heavy, light, heavy. She had marked it.

"Ready," she said.

"Mark," Sharath said.

He brought the counter-drive in on the first heavy syllable, and the magnet screamed.

For a second everything got worse. The sphere in the aquarium flared and doubled and the flux current kicked against 6.8 and the whine through the floor went up into something she felt in her fillings. The coffee jumped clean out of the cap and across the keyboard. The light in the lowest window flared and laid a gold edge on every stage above it, the whole chandelier lit from below for one second.

"Your phase is late," Sharath said. He had not raised his voice. "Eleven degrees. Twelve."

"I see it."

"Current six point eight. Six point eight. MXC three hundred and ten."

She moved the knob. Not to where the numbers said the swell was, but a little ahead of it, to where the next syllable would put it. Light. Heavy. She felt the heavy one coming as you feel a stair in the dark, with the ball of your foot before your weight goes down. She was there when it arrived.

The whine dropped half a tone.

"Six point seven," Sharath said. "Six point six. Good. Negative three degrees. It's drifting ahead of you."

"It's the caesura. It pauses at the end of the line. Wait."

"I'm waiting."

The line ended. The swell paused. She held the knob still through the pause, and when the next line began she was on it.

"Six point five. Six point three."

Across the room the helium needle stopped moving in the red band. It did not fall yet. It stopped.

The sphere in the aquarium was shrinking, but not smoothly. It fought. Every third or fourth swell it bucked, and she lost it, and she went after it with the fader past the white mark on the grey box that said MAX SLEW, and Sharath said "past the mark" and nothing else, and she said "yes" and stayed past it.

"It wants to break," she said. Her voice was shaking. Her hand was not, or not much.

"It will not break," Sharath said. "Hold."

His numbers came out at the same speed, in the same tone, six point two, six point oh, five point eight, phase fine, phase fine, and she wove the phase around them, ahead and behind, following a hymn three thousand years older than either of them. Twice she was early. Once, at the end of the sixth verse, she was late by a syllable, and the current jumped, and he caught the jump with the amplitude before she could apologise.

ko addhā veda. Who really knows?

She did not know. She held anyway.

"Five point one," Sharath said. "Four point six. Four point three." And then, a little quieter, "Four point oh two."

On console two, the setpoint and the current said the same number.

The magnet's whine went down through a note, and another, and stopped.

In the silence afterward there was only the pulse tube. Chuff, a pause, thump. And, very faint, round the curve of the corridor, a man snoring in long complicated ropes, who had not woken.

MXC 140 mK. 60. 22. It fell as it had climbed, in a long even ramp, faster than any fridge she had ever nursed back down, and it came to rest at 9.0 and stayed there.

The sphere in the aquarium was gone. The aquarium was empty, rising, clean, clean, clean. And in the lowest window of the gold shields, the light had not gone out. It had drawn in on itself until it was a single point, small and steady and gold, hanging a hand's width above the mixing-chamber plate, touching nothing.

It did not flicker. It gave off no heat that console two could find. It hung there as if it had always been there and the rest of the machine had been built around it.

Ananya let go of the fader and sat down hard, with coffee drying stickily across the keys and her hands between her knees.

On the coherence monitor a timer she had not known she had started said 02:47: two minutes and forty-seven seconds from the first heavy syllable to four point oh two, eleven hundred and eight qubits held in phase with each other and with nothing else in the universe. The monitor had given up on numbers. Every field said —.

Because her hands needed a sum, she did one. The magnet had gone from 4.02 to 6.8 amps: by ½LI², nearly three times its working energy, put in within a minute. Nothing had put it there. The drive lines carried less than a microwatt, and she had aborted them. Eleven hundred transmons giving up every photon they held came to less energy than a grain of dust falling a millimetre. Sharath had said the array pushed current into the magnet, and it had. She could not find what it had pushed with.

Sharath put his jacket back on.

He straightened his cuffs, and she saw that his hands were not quite steady.

He stood in front of the Core's glass, closer than Nag had ever let her stand, and looked down at the point. He laid two fingers against the glass and took them away, and left their marks there for the investor tours.

"Hiraṇyagarbha," he said, to the glass. The golden womb. He said it under his breath, in the Sanskrit, not as anyone says a project name, and then he did not say anything else for a long time.

She thought of the burst disc behind its yellow sticker, and of Bhaskar in his Ikea bed with his mother's bhajan still in his ear. She had been ninety seconds from killing him, and she had not once thought of him until another person said his name. The shame came up in her like the cold had come up through the floor, slowly and all the way.

When Sharath turned round, whatever had been in his face in front of the glass had been put away.

"You are not on the night list," he said.

"No, sir."

"You came down at twenty to ten on the day list with a spectrum analyser and never went back up. You sat behind my gas cabinets for five hours. You ran a replay on my cameras and a shim on my logs, and at seventeen minutes past three you put a hymn into a machine you have operated for seven weeks, through a remote." He did not come closer. "The building isn't only cameras, Doctor."

"I was testing a hypothesis," she said. It sounded as stupid out loud as it had sounded in her head.

"You were testing it on the only Core in the country, with two men forty metres away and the dampers shut. What was the hypothesis?"

She opened her mouth and shut it. "That it could be done."

"It can be done. Congratulations." He looked at console two, at the calm numbers, and back. "You nearly put a few thousand crores of instrumentation and two technicians into a helium cloud to find that out."

"Am I fired, sir?"

He watched her, doing the same small sum she had seen on his lips as he walked in, only now the terms were her.

"On the record," he said, "it isn't firing. It's criminal negligence. Unauthorised access, falsified logs, a breached SCRAM seal, two men endangered. You would leave this building with a policeman on each side, and you would not work in a lab again in any country that reads the newspapers."

She closed her eyes. Behind her eyelids she saw, of all things, the guard's green tick on the paper list. Nayagiri, A. 21:40. The one record she had never thought to touch, because it was paper, and paper did not hang.

"However," Sharath said. He had turned back toward the glass. His hands had gone behind his back. "I have no particular use for the record."

She opened her eyes.

"Delete the logs," he said. "The real ones and the ones you faked. Take the replay off my cameras and put the feed back. Take your job out of the scheduler. You seem perfectly capable of it."

"Sir. Why?"

He stood looking at the point in the window, and then he let out a long breath.

"Two minutes forty-seven," he said. "Eleven hundred and eight. Held." He turned his head, not all the way. "I have a thousand PhDs in this building who follow the queue. You wrote a hymn and ran it at three in the morning. That's either the stupidest thing anyone has done on my Core or the only interesting one. I haven't decided."

She had been frightened of him since the word Don't, and under it, worse, she was ashamed of how badly she wanted to be the interesting one.

"Delete it," he said. "We haven't met. None of this happened. Nag writes in his book that the night was nominal, and for once he'll be right."

He walked to the mouth of the corridor. The lift lobby light lay on the black floor there, a pale square, and he stepped into it, and stopped.

Beyond him, up the curve where the quarters began, Nag was standing in the dark in his Quantace polo, hands at his sides, the Casio pale on his wrist. She did not know how long he had been there. He did not come forward, and Sharath did not look round at him. He only watched her, pleasantly, as a man watches a reading come in that he has already written down.

Sharath turned halfway back. With the light behind him she could not see his face at all.

"What is your name?"