“Did you know,” Tuthy said, assuming his highest Cambridge professional tone, “that a cube, intersecting a flat plane, can be cut through a number of geometrically different cross sections?”
Pal squinted at the sketch Tuthy had made. “Sure,” he said.
“If shoved through the plane, the cube can appear, to a two-dimensional creature living on the plane—let’s call him a Flatlander—to be either a triangle, a rectangle, a trapezoid, a rhombus, or a square. If the two-dimensional being observes the cube being pushed through all the way, what he sees is one or more of these objects growing larger, changing shape suddenly, shrinking, and disappearing.”
“Sure,” Pal said, tapping his sneakered toe. “It’s easy. Like in that book you showed me.”
“And a sphere pushed through a plane would appear to the hapless Flatlander first as an invisible point (the two-dimensional surface touching the sphere, tangential), then as a circle. The circle would grow in size, then shrink back to a point and disappear again.” He sketched the stick figures, looking in awe at the intrusion.
“Got it,” Pal said. “Can I play with the Tronclavier now?”
“In a moment. Be patient. So what would a tesseract look like, coming into our three-dimensional space? Remember the program, now—the pictures on the monitor.”
Pal looked up at the ceiling. “I don’t know,” he said, seeming bored.
“Try to think,” Tuthy urged him.
“It would…” Pal held his hands out to shape an angular object. “It would look like one of those Egyptian things, but with three sides … or like a box. It would look like a weird-shaped box, too, not square.”
“And if we turned the tesseract around?”
The doorbell rang. Pal jumped off the kitchen chair. “Is that my Mom?”
“I don’t think so,” Lauren said. “More likely it’s Hockrum.” She went to the front door to answer. She returned with a small, pale man behind her. Tuthy stood and shook the man’s hand. “Pal Tremont, this is Irving Hockrum,” he introduced, waving his hand between them. Hockrum glanced at Pal and blinked a long, not-very-mammalian blink.
“How’s the work coming?” he asked Tuthy.
“It’s finished,” Tuthy said. “It’s upstairs. Looks like your savants are barking up the wrong logic tree.” He retrieved a folder of papers and printouts and handed them to Hockrum.
Hockrum leafed through the printouts.
“I can’t say this makes me happy,” he said. “Still, I can’t find fault. Looks like the work is up to your usual brilliant standards. I just wish you’d had it to us sooner. It would have saved me some grief—and the company quite a bit of money.”
“Sorry,” Tuthy said nonchalantly.
“Now I have an important bit of work for you.…” And Hockrum outlined another problem. Tuthy thought it over for several minutes and shook his head.
“Most difficult, Irving. Pioneering work there. It would take at least a month to see if it’s even feasible.”
“That’s all I need to know for now—whether it’s feasible. A lot’s riding on this, Peter.” Hockrum clasped his hands together in front of him, looking even more pale and worn than when he had entered the kitchen. “You’ll let me know soon?”
“I’ll get right on it,” Tuthy said.
“Protégé?” he asked, pointing to Pal. There was a speculative expression on his face, not quite a leer.
“No, a friend. He’s interested in music.” Tuthy said. “Damned good at Mozart, in fact.”
“I help with his tesseracts,” Pal asserted.
“Congratulations,” Hockrum said. “I hope you don’t interrupt Peter’s work. Peter’s work is important.”
Pal shook his head solemnly. “Good,” Hockrum said, and then left the house to take the negative results back to his company.
Tuthy returned to his office, Pal in train. Lauren tried to work in the kitchen, sitting with fountain pen and pad of paper, but the words wouldn’t come. Hockrum always worried her. She climbed the stairs and stood in the doorway of the office. She often did that; her presence did not disturb Tuthy, who could work under all sorts of conditions.
“Who was that man?” Pal was asking Tuthy.
“I work for him.” Tuthy said. “He’s employed by a very big electronics firm. He loans me most of the equipment I use here—the computers, the high-resolution monitors. He brings me problems and then takes my solutions back to his bosses and claims he did the work.”
“That sounds stupid,” Pal said. “What kind of problems?”
“Codes, encryptions. Computer security. That was my expertise, once.”
“You mean, like fencerail, that sort of thing?” Pal asked, face brightening. “We learned some of that in school.”
“Much more complicated, I’m afraid,” Tuthy said, grinning. “Did you ever hear of the German ‘Enigma,’ or the ‘Ultra’ project?”
Pal shook his head.
“I thought not. Don’t worry about it. Let’s try another figure on the screen now.” He called up another routine on the four-space program and sat Pal before the screen. “So what would a hypersphere look like if it intruded into our space?”
Pal thought a moment. “Kind of weird.”
“Not really. You’ve been watching the visualizations.”
“Oh, in our space. That’s easy. It just looks like a balloon, blowing up from nothing and then shrinking again. It’s harder to see what a hypersphere looks like when it’s real. Reft of us, I mean.”
“Reft?” Tuthy said.
“Sure. Reft and light. Dup and owwen. Whatever the directions are called.”
Tuthy stared at the boy. Neither of them had noticed Lauren in the doorway. “The proper terms are ana and kata,” Tuthy said. “What does it look like?”
Pal gestured, making two wide swings with his arms. “It’s like a ball, and it’s like a horseshoe, depending on how you look at it. Like a balloon stung by bees, I guess, but it’s smooth all over, not lumpy.”
Tuthy continued to stare, then asked quietly, “You actually see it?”
“Sure,” Pal said. “Isn’t that what your program is supposed to do—make you see things like that?”
Tuthy nodded, flabbergasted.
“Can I play the Tronclavier now?”
Lauren backed out of the doorway. She felt she had eavesdropped on something momentous but beyond her. Tuthy came downstairs an hour later, leaving Pal to pick out Telemann on the keyboard. He sat at the kitchen table with her. “The program works,” he said. “It doesn’t work for me, but it works for him. He’s a bloody natural.” Tuthy seldom used such language. He was clearly awed. “I’ve just been showing him reverse-shadow figures. There’s a way to have at least a sensation of seeing something rotated through the fourth dimension. Those hollow masks they use at Disneyland … seem to reverse in and out, depending on the lighting? Crater pictures from the moon—resemble hills instead of holes? That’s what Pal calls the reversed images—hills and holes.”
“And what’s special about them?”
“Well, if you go along with the game and make the hollow faces seem to reverse and poke out at you, that is similar to rotating them in the fourth dimension. The features seem to reverse left and right—right eye becomes left eye, and so on. He caught on right away, and then he went off and played Haydn. He’s gone through all my sheet music. The kid’s a genius.”
“Musical, you mean?”
He glanced directly at her and frowned. “Yes, I suppose he’s remarkable at that, too. But spatial relations—coordinates and motion in a higher dimension.… Did you know that if you take a three-dimensional object and rotate it in the fourth dimension, it will come back with left-right reversed? There is no fixed left-right in the fourth dimension. So if I were to take my hand—” He held up his right hand, “and lift it dup—or drop it owwen, it would come back like this?” He held his left hand over his right, balled the right up into a fist, and snuck it away behind his back.
“I didn’t know that,” Lauren said. “What are dup and owwen?”
“That’s what Pal calls movement along the fourth dimension. Ana and kata to purists. Like up and down to a Flatlander, who only comprehends left and right, back and forth.”
She thought about the hands for a moment. “I still can’t see it,” she said.
“Neither can I,” Tuthy admitted. “Our circuits are just too hard-wired, I suppose.”
Pal had switched the Tronclavier to a cathedral organ and wah-guitar combination and was playing variations on Pergolesi.
“Are you going to keep working for Hockrum?” Lauren asked. Tuthy didn’t seem to hear her.
“It’s remarkable,” he murmured. “The boy just walked in here. You brought him in by accident. Remarkable.”
* * *
“Do you think you can show me the direction—point it out to me?” Tuthy asked the boy three days later.
“None of my muscles move that way,” he replied. “I can see it, in my head, but…”
“What is it like, seeing it? That direction?”
Pal squinted. “It’s a lot bigger. Where we live is sort of stacked up with other places. It makes me feel lonely.”
“Why?”
“Because I’m stuck here. Nobody out there pays any attention to us.”
Tuthy’s mouth worked. “I thought you were just intuiting those directions in your head. Are you telling me you’re actually seeing out there?”
“Yeah. There’s people out there, too. Well, not people, exactly. But it isn’t my eyes that see them. Eyes are like muscles—they can’t point those ways. But the head—the brain, I guess—can.”
“Bloody hell,” Tuthy said. He blinked and recovered. “Excuse me. That’s rude. Can you show me the people … on the screen?”
“Shadows, like we were talking about.”
“Fine. Then draw the shadows for me.”
Pal sat down before the terminal, fingers pausing over the keys. “I can show you, but you have to help me with something.”
“Help you with what?”
“I’d like to play music for them—out there. So they’ll notice us.”
“The people?”
“Yeah. They look really weird. They stand on us, sort of. They have hooks in our world. But they’re tall … high dup. They don’t notice us because we’re so small, compared with them.”
“Lord, Pal, I haven’t the slightest idea how we’d send music out to them.… I’m not even sure I believe they exist.”
“I’m not lying,” Pal said, eyes narrowing. He turned his chair to face a “mouse” perched on a black ruled pad and used it to sketch shapes on the monitor. “Remember, these are just shadows of what they look like. Next I’ll draw the dup and owwen lines to connect the shadows.”
The boy shaded the shapes to make them look solid, smiling at his trick but explaining it was necessary because the projection of a four-dimensional object in normal space was, of course, three dimensional.
“They look like you take the plants in a garden and give them lots of arms and fingers … and it’s kind of like seeing things in an aquarium,” Pal explained.
After a time, Tuthy suspended his disbelief and stared in open-mouthed wonder at what the boy was re-creating on the monitor.
* * *
“I think you’re wasting your time, that’s what I think,” Hockrum said. “I needed that feasibility judgment by today.” He paced around the living room before falling as heavily as his light frame permitted into a chair.
“I have been distracted,” Tuthy admitted.
“By that boy?”
“Yes, actually. Quite a talented fellow.”
“Listen, this is going to mean a lot of trouble for me. I guaranteed the judgment would be made by today. It’ll make me look bad.” Hockrum screwed up his face in frustration. “What in hell are you doing with that boy?”
“Teaching him, actually. Or rather, he’s teaching me. Right now, we’re building a four-dimensional cone, part of a speaker system. The cone is three dimensional—the material part—but the magnetic field forms a fourth-dimensional extension.”
“Do you ever think how it looks, Peter?”
“It looks very strange on the monitor, I grant you—”
“I’m talking about you and the boy.”
Tuthy’s bright, interested expression fell slowly into long, deep-lined dismay. “I don’t know what you mean.”
“I know a lot about you, Peter. Where you come from, why you had to leave.… It just doesn’t look good.”
Tuthy’s face flushed crimson.
“Keep him away,” Hockrum advised.
Tuthy stood. “I want you out of this house,” he said quietly. “Our relationship is at an end.”
“I swear,” Hockrum said, his voice low and calm, staring up at Tuthy from under his brows, “I’ll tell the boy’s parents. Do you think they’d want their kid hanging around an old—pardon the expression—queer? I’ll tell them if you don’t get the feasibility judgment made. I think you can do it by the end of this week—two days. Don’t you?”
“No, I don’t think so,” Tuthy said softly. “Leave.”
“I know you’re here illegally. There’s no record of you entering the country. With the problems you had in England, you’re certainly not a desirable alien. I’ll pass word to the INS. You’ll be deported.”
“There isn’t time to do the work,” Tuthy said.
“Make time. Instead of ‘educating’ that kid.”
“Get out of here.”
“Two days, Peter.”
* * *
Over dinner, Tuthy explained to Lauren the exchange he had had with Hockrum. “He thinks I’m buggering Pal. Unspeakable bastard. I will never work for him again.”
“I’d better talk to a lawyer, then,” Lauren said. “You’re sure you can’t make him … happy, stop all this trouble?”
“I could solve his little problem for him in just a few hours. But I don’t want to see him or speak to him again.”
“He’ll take your equipment away.”
Tuthy blinked and waved one hand through the air helplessly. “Then we’ll just have to work fast, won’t we? Ah, Lauren, you were a fool to bring me over here. You should have left me to rot.”
“They ignored everything you did for them,” Lauren said bitterly. She stared through the kitchen window at the overcast sky and woods outside. “You saved their hides during the war, and then … they would have shut you up in prison.”
* * *
The cone lay on the table near the window, bathed in morning sun, connected to both the minicomputer and the Tronclavier. Pal arranged the score he had composed on a music stand before the synthesizer. “It’s like a Bach canon,” he said, “but it’ll play better for them. It has a kind of counterpoint or over-rhythm that I’ll play on the dup part of the speaker.”
“Why are we doing this, Pal?” Tuthy asked as the boy sat down to the keyboard.
“You don’t belong here, really, do you, Peter?” Pal asked. Tuthy stared at him.
“I mean, Miss Davies and you get along okay—but do you belong here, now?”
“What makes you think I don’t belong?”
“I read some books in the school library. About the war and everything. I looked up Enigma and Ultra. I found a fellow named Peter Thornton. His picture looked like you but younger. The books made him seem like a hero.”
Tuthy smiled wanly.
“But there was this note in one book. You disappeared in 1965. You were being prosecuted for something. They didn’t even mention what it was you were being prosecuted for.”
“I’m a homosexual,” Tuthy said quietly.
“Oh. So what?”
“Lauren and I met in England, in 1964. They were going to put me in prison, Pal. We liked—love each other, so she smuggled me into the U.S. through Canada.”
“But you’re a homosexual. They don’t like women.”
“Not at all true,
Pal. Lauren and I like each other very much. We could talk. She told me her dreams of being a writer, and I talked to her about mathematics and about the war. I nearly died during the war.”
“Why? Were you wounded?”
“No. I worked too hard. I burned myself out and had a nervous breakdown. My lover … a man … kept me alive throughout the Forties. Things were bad in England after the war. But he died in 1963. His parents came in to settle the estate, and when I contested the settlement in court, I was arrested.” The lines on his face deepened, and he closed his eyes for a long moment. “I suppose I don’t really belong here.”
“I don’t either. My folks don’t care much. I don’t have too many friends. I wasn’t even born here, and I don’t know anything about Korea.”
“Play,” Tuthy said, his face stony. “Let’s see if they’ll listen.”
“Oh, they’ll listen,” Pal said. “It’s like the way they talk to each other.”
The boy ran his fingers over the keys on the Tronclavier. The cone, connected with the keyboard through the minicomputer, vibrated tinnily. For an hour, Pal paged back and forth through his composition, repeating passages and creating variations. Tuthy sat in a corner, chin in hand, listening to the mousy squeaks and squeals produced by the cone. How much more difficult to interpret a four-dimensional sound, he thought. Not even visual clues. Finally the boy stopped and wrung his hands, then stretched his arms. “They must have heard. We’ll just have to wait and see.” He switched the Tronclavier to automatic playback and pushed the chair away from the keyboard.
Pal stayed until dusk, then reluctantly went home. Tuthy stood in the office until midnight, listening to the tinny sounds issuing from the speaker cone. There was nothing more he could do. He ambled down the hall to his bedroom, shoulders slumped.
All night long the Tronclavier played through its preprogrammed selection of Pal’s compositions. Tuthy lay in bed in his room, two doors down from Lauren’s room, watching a shaft of moonlight slide across the wall. How far would a four-dimensional being have to travel to get here?
How far have I come to get here?
Without realizing he was asleep, he dreamed, and in his dream a wavering image of Pal appeared, gesturing with both arms as if swimming, eyes wide. I’m okay, the boy said without moving his lips. Don’t worry about me.… I’m okay. I’ve been back to Korea to see what it’s like. It’s not bad, but I like it better here.…
The Year’s Best Science Fiction: Fourth Annual Collection Page 42