There was no shame in it, Dallen told himself. No shame in being flexible, in adapting to circumstances the way other people did. He had the opportunity to make a grand, romantic gesture of unselfishness, and there was no need to reveal to anybody, least of all to his wife, that it was actually a supremely selfish act in that it would enable him to hold on to what he cherished.

"Monument. Photograph." Cona wiggled her fingers close to his eyes. "Remember?"

"I'm with you," Dallen said bemusedly, trying to reassemble his internal model of the universe with different building blocks. He walked with Cona along the edge of the aperture to where the path widened into a small semi-circular plaza. Standing at its focus, on the very rim of space, was an heroic bronze of a man wearing a space suit of a design that had been in service two centuries earlier. He had taken off his helmet and was holding it in one hand while, with the other hand shading his eyes, he scanned the horizon. The statue was deservedly famous because its creator had captured a certain expression on the spaceman's face. It was a look of awe combined with peace and fulfilment which struck a responsive chord with all who had had the experience of climbing through an Orbitsville portal from the sterile blackness of space and receiving their first glimpse of the grassy infinites within.

A plaque at the foot of the statue said, simply: VANCE GARAMOND, EXPLORER.

Cona, who had never seen the monument before, said, "I must have a picture." She left Dallen's side and moved away among the knots of sightseers who were standing in the multi-lingual information beams being projected from the statue's base. Dallen, still lost in his own thoughts, advanced until a wash of coloured light flooding into his eyes told him that one of the roving beams had centred itself on his face. There was a barely perceptible delay while the projector stuthed his optical response to subliminal signals and correctly deduced that his first language was English, then the presentation began. Most of his field of view was suddenly occupied by images focused directly on to his retinas. They were of a triple-hulled starship, as seen from space, manoeuvring closer to a circular aperture in the Orbitsville shell. A voice which was neither male nor female spoke to Dallen.

It was almost two centuries ago — in the year 2096 — that the first spaceship from Earth reached Optima Thule. That vessel was the Bissendorf, part of a large fleet of exploratory ships owned and operated by Starlight Incorporated, the historic company which at that time bad a monopoly of space travel. The Bissendorf was under the command of Captain Vance Garamond.

You are now standing at the exact place where Captain Garamond, after forcing bis way through the diaphragm field which retains our atmosphere first set foot on the soil of Optima Thule…

The images were now a reconstruction of the first landing, showing Garamond and some of his crew on the virgin plain which was currently occupied by the sprawling expanse of Beachhead City. Relevant facts were murmured in Dallen's ears only to glance off the barriers of his preoccupation. What was to prevent him from actually doing it? What would it matter to the universe at large if he did not make the flight to Earth? There would be some fierce ribbing from the other pilot officers in the Boundaries Commission if he returned to his old job, but where were his personal priorities? What was the opinion of outsiders compared to the feelings and needs of his own wife? And there was three-month old Mikel…

The ruined fortifications visible to your right are among the few retraining traces of the Printer civilisation which flourished on Optima Thule some twenty thousand years ago. Although we know very little about the Primers, we can he sure they were a very energetic and ambitious race. Having discovered Optima Thule, they attempted to control the whole sphere — regardless of the fact that it has a usable land area equivalent to five billion Earths. To this endt they performed the incredible engineering feat of sealing with armour plate all but one of Optima Thule's 548 portals.

Opinions differ about whether they were vanquished by subsequent arrivals, or whether they were simply absorbed by the sheer vastness of the territories they bad attempted to claim. However, one of the first actions of the Optima Thule Metagovernment was to order the unsealing of all the portals, thereby giving every nation on Earth unlimited and free access to…

Cartoon animations floated on the surface of Dallen's vision. Miniature ships were firing miniature radiation weapons, progressively clearing Orbitsville's triple band of portals, allowing the enclosed sun to spill more and more of its beckoning rays into the surrounding blackness of space.

The migrations from Earth began immediately, and continued at a high level of activity for a century and a half. In the beginning the journey took four months, but there came many rapid improvements in spaceship design which eventually cut transit time to a matter of days. At the height of the migrations more than ten million people a year were arriving at the equatorial portals, a transport undertaking of such magnitude that…

Annoyed by the intrusive voice and images, Dallen turned away sharply and broke the beam contact. He retreated to the curving edge of the plaza and sat down on a bench to watch Cona taking her holographic pictures of the monument. Again it seemed to him that her interest in the statue and its historic associations was a little too evident, that she was putting on a show for his benefit. The message was that she would be fully occupied in getting on with her own life while they were apart, but did he have to interpret that as defiance? Was it not possible, knowing Cona, that she was only trying to make things easier for him by not clinging on? I’d be crazy to cut myself off from this, he thought, poised on the edge of a decision. He stood up and waved as Cona lowered her recorder and turned to look for him. She waved back and zigzagged towards him through the clusters of wide-brimmed hats which were worn almost universally on Orbitsville as protection from the sun's vertical rays. He smiled, trying to visualise how she was going to react to his momentous news. He had the choice of breaking it to her suddenly, going for maximum dramatic effect, or of a more oblique approach in which, perhaps, he would begin by suggesting that they go out of the hotel that light for a special celebration dinner.

Cona had just cleared the groups of sightseers when two boys of about ten ran up to her. She halted and, after a short exchange of words, opened her purse and gave them some money. The boys ran off immediately, laughing and pushing at each other as they went.

"Young monkeys," Cona said on reaching Dallen. "They said they needed carfare home, but you could see they were heading straight for the soda machines."

An inner voice pleaded with Dallen to ignore the incident, but he was unable to control his reaction. "So why did you give them the money?"

"They were just a couple of lads."

"That's precisely the point. They were just a couple of kids and you taught them it pays to ask strangers for hand-outs."

"For God's sake. Carry, try to relax." Cona's voice was lightly scornful. "It was only fifty cents."

"The amount doesn't come into it." Dallen stared hard at his wife, furious with her for the way she was casually destroying what had promised to be the most perfect moment of their lives. "Do you really think I give a damn whether it was fifty cents or fifty monks? Do you?"

"I didn't realise you were so hot on child welfare." Cona, standing within the vertical column of shade from her hat, might have retreated into a separate world.

"And what does that mean?" he asked, knowing exactly what it meant and challenging her to use Mikel as a weapon against him. They were standing on the edge of a precipice and the ground was breaking away beneath their feet, but the big drop might still be avoided if only she held back from using Mikel.