Even here at the Erythro Dome, where there was a natural day and night that was casually used as such by those in occupation, it was the not-quite-matching Settlement day length, still tied to that of Earth (the memory of a memory), that was used in official calculations.

The movement was now stronger to leave the day as the only basic measure of time. Insigna knew for a fact that Pitt favored the decimalization of time measure, and yet even he hesitated to suggest it officially, for fear of rousing wild opposition.

But perhaps not for ever. The traditional disorderly units of weeks and months seemed less important. The traditional holidays were more frequently ignored. Insigna, in her astronomical work, used days as the only significant units. Someday the old calendar would die, and, in the far unseen future, new methods of agreed-upon time marking would surely arise - a Galactic Standard calendar, perhaps.

But now she found herself marking off the time to a New Year that began arbitrarily. On Earth, at least the New Year began at the time of a solstice - winter in the northern hemisphere, summer in the southern. It had a relationship to Earth's orbit around the Sun that only the astronomers on Rotor remembered clearly.

But now - even though Insigna was an astronomer - the New Year had to do only with Marlene's venture on to the surface of Erythro - a time chosen by Siever Genarr only because it involved a plausible delay, and accepted by Insigna only because she was officiously concerning herself with a teenager's notion of romance.

Insigna came out of her roaming through the depths of thought to find Marlene regarding her solemnly. (When had she entered the room so silently, or was Insigna so tied into an inner knot as to be unaware of footsteps?)

Insigna said in half a whisper, ‘Hello, Marlene.’

Marlene said solemnly, ‘You're not happy, Mother.’

‘You don't have to be superperceptive to see that, Marlene. Are you still determined to step out on Erythro?’

‘Yes. Entirely. Completely.’

‘Why, Marlene, why? Can you explain it so I can understand?’

‘No, because you don't want to understand. It's calling me.’

‘What's calling you?’

‘Erythro is. It wants me out there.’ Marlene's ordinarily glum face seemed suffused with a furtive happiness.

Insigna snapped, ‘When you talk like that, Marlene, you simply give me the impression that you are already infected by the - the-’

‘The Plague? I'm not. Uncle Siever has just had another brain scan taken of me. I told him he didn't have to, but he said we had to have it for the record before we left. I'm perfectly normal.’

‘Brain scans can't tell you everything,’ said Insigna, frowning.

Marlene said, ‘Neither can a mother's fears.’ Then, more softly, ‘Mother, please, I know you want to delay this, but I won't accept a delay. Uncle Siever has promised. Even if it rains, even if it's bad weather, I'm going out. At this time of the year, there are never real storms or temperature extremes. There are almost never at any time of the year. It's a wonderful world.’

‘But it's barren - dead. Except for germs ,’ Insigna said spitefully.

‘But someday we'll put life of our own upon it.’ Marlene looked away, her eyes lost in dreaming. ‘I'm sure of it,’ she said.

‘The E-suit is a simple suit,’ said Siever Genarr. ‘It doesn't have to withstand pressure. It's not a diving suit or a a spacesuit. It has a helmet, and it has a compressed air supply that can be regenerated, and a small heat-exchange unit that keeps the temperature comfortable. And it's airtight, obviously.’

‘Will it fit me?’ asked Marlene, looking at the display of thickish pseudo-textile material with distaste.

‘Not fashionably so,’ said Genarr, his eyes twinkling. ‘It isn't made for beauty, but for use.’

Marlene said in a slightly exasperated tone, ‘I'm not interested in looking beautiful, Uncle Siever, but I don't want to be slopping around in it. If it makes walking hard, it won't be worth it.’

Eugenia Insigna interrupted. She had been watching, a little white-faced and pinch-lipped. ‘The suit is necessary to protect you, Marlene. I don't care how sloppy it is.’

‘But it doesn't have to be uncomfortable, Mother, does it? If it happens to fit, it would protect me just the same.’

‘This will fit fairly well, actually,’ said Genarr. ‘It's the best we could find. After all, we only have them in adult sizes.’ He turned his head toward Insigna. ‘We don't use them much these days. There was a time after the Plague died down that we did some exploring, but by now we know the immediate surroundings quite well, and on the rare occasions we do go out, we tend to use enclosed E-cars.’

‘I wish you'd use an enclosed E-car now.’

‘No,’ said Marlene, obviously pained at the suggestion, ‘I've been out in a vehicle. I want to walk. I want to - feel the ground.’

‘You're mad,’ said Insigna discontentedly.

Marlene fired back, ‘Will you stop implying-’

‘Where's your perceptivity? I wasn't referring to the Plague. I mean just plain mad, just mad in the ordinary sense. I mean- Please, Marlene, you're driving me mad, as well.’

She then said, ‘Siever, if these are old E-suits, how do you know they don't leak?’

‘Because we've tested them, Eugenia. I assure you they're in good working order. Remember, I'm going out with her, and also in a suit.’

Insigna was clearly seeking objections. ‘And suppose you suddenly have to-’ She waved her hand meaning-lessly.

‘Urinate? Is that what you mean? That can be taken care of, though it's not comfortable. Still, it won't arise. We've emptied our bladders and we're good for several hours - or should be. And we're not venturing far off, so in case of emergency, we can come back to the Dome. We ought to leave now, Eugenia. Conditions are good outside and we should take advantage of that. Here, Marlene, let me help you with your suit.’

Insigna said sharply, ‘Don't sound so happy.’

‘Why not? To tell you the truth, I would like to step out myself. The Dome can easily start to feel like a prison, you know. Maybe if we all stepped out more, our people could endure longer shifts in the Dome. There you are, Marlene, we only have to fit on the helmet, now.’

Marlene hesitated. ‘Just a minute, Uncle Siever.’ She walked toward Insigna, holding out her arm, suited and bulky.

Insigna gazed at her mournfully.

‘Mother,’ said Marlene. ‘Once again, please be calm. I love you and I wouldn't do this and cause you such anxiety just to please myself. I do it only because I know I will be fine and that you need not be anxious. And I bet you want to get into an E-suit also, so you can come out and never lose sight of me, but you mustn't.’

‘Why mustn't I, Marlene? How will I forgive myself if something happens to you and I'm not there to help you?’

‘But nothing will happen to me. And even if something does, which it won't, what could you do about it? Besides, you're so afraid of Erythro that your mind is probably open to all kinds of abnormal effects. What if the Plague should strike you rather than me? How would you expect me to live with that ?’

‘She's right, Eugenia,’ said Genarr. ‘I'll be out there with her, and the best thing you can do is stay here and remain calm. All E-suits are equipped with radios. Marlene and I will be able to hear each other, and we will be in communication with the Dome. I promise you, if she behaves queerly in any way at all, if there is even the suspicion of oddness, I'll have her inside the Dome at once. And if I feel in any way not quite my own normal self, I will come back at once, bringing Marlene with me.’

Insigna shook her head and did not look comforted as she watched the helmet being fitted first over Marlene's head, and then over Genarr's.

They were near the Dome's main airlock and Insigna watched its manipulation. She knew the lock procedure perfectly well - one could scarcely be a Settler otherwise.

There was the delicate control of air pressure to make sure that there would be a gentle transfer of air from the Dome outward, never from Erythro inward. There were computerized checks at every moment to make sure there were no leaks.

And then the inner door opened. Genarr stepped into the airlock and beckoned Marlene inward. She followed, and the door closed. The two were lost to immediate sight. Insigna distinctly felt her heart miss a beat.

She watched the controls and knew exactly when the outer door slid open and, then, when it closed again. The holoscreen sprang to life and she could see the two suited figures on it, standing on the barren soil of Erythro.

One of the engineers handed a small earplug to Insigna, who inserted it into her right ear. An equally small microphone was fitted over her head.

A voice in her ear said, ‘Radio contact,’ and at once, the familiar voice of Marlene sounded. ‘Can you hear me, Mother?’

‘Yes, dear,’ said Insigna. Her voice sounded dry and abnormal in her own ear.

‘We're out here and it's wonderful. It couldn't be nicer.’

‘Yes, dear,’ Insigna repeated, feeling hollow and lost and wondering whether she would see her daughter in her right mind again.

Siever Genarr felt almost lighthearted as he stepped out upon the surface of Erythro. The sloping wall of the Dome, behind him, reached upward, but he kept his back to it, for a sight so un-Erythronian would have spoiled the savor of the world.

Savor? It was a queer word to use for Erythro, for at the moment it had no meaning. He lived behind the protection of his helmet, breathing the air of the Dome, or at least the air that had been purified and conditioned within the Dome. He could not smell the planet, or taste it, within that shelter.

And yet there was a feel to it that made him oddly happy. His boots crunched slightly upon the ground. Although Erythro's surface was not rocky, it was rather gravelly and, between the bits of gravel, there was what he could only describe as soil. There was, of course, ample water and air to break up the primordial surface rock and, perhaps, the ubiquitous prokaryotes had, in their countless trillions, added their own work patiently over the billions of years.

The soil felt soft. It had rained the day before, the soft and steady misty rain of Erythro - or at least of this portion of Erythro. The soil still felt slightly damp as a result, and Genarr imagined the bits of soil, the tiny scraps of sand and loam and clay, each with its coat of water film that had been refreshed and renewed. In that film, prokaryotic cells lived happily, basking in the energy of Nemesis, building complex proteins out of simple ones, while other prokaryotes, indifferent to solar energy, made use, instead of the energy content of the remnants of those prokaryotes that, in their countless trillions, died during each moment of time.