A few other swimmers were out, and I guessed some of my fellow restaurant workers were among them. I swam around the break, out beyond the crater, where the swells first hit the shelf and started to rise to their full height, which today was nearly ten meters. Three of my friends were out there, Wendy, Laura, and Fist; I waved to them, then floated on my back and waited for them to take their turns. Rising and falling on those smooth swells I felt quite inhuman; all that I saw, felt, and heard — even the sound of my own breath — was strange, alien, too sublime for human sensibility.

Then I was alone at the point break. A swell approached and I backstroked away from it, toward the point where it would first break, adjusting my speed so I would be just outside that point when the wave picked me up.

The wave reached me and I felt its strong lift. I turned luxuriously onto my stomach, skimmed down the steepening face until I felt that the swell was pitching out over me. From my thighs up I was clear of the methane, skating on my hand — fins — I turned them left, and swerved across the wave, just ahead of the break, flying, flying… I moved my feet to retard my speed a fraction, and the roof of the breaking wave moved ahead of me. It got dark. I was in the tube. My hands were below me, jammed into the methane to keep me from falling down the face. I was motionless yet flying, propelled through the blackness at tremendous speed by the liquid which rushed up past my left shoulder, arched over my head, and fell out beyond my right shoulder. Before me there was a huge tunnel, and at the end of this swirling obsidian tube a small ellipse of velvet black, packed with stars.

The opening got smaller, indicating that the wave was past the submerged crater, and receding. I dropped to gain speed, turned back up and shot through the hole, over the swell and back onto the smooth glassy surface, under the night.

Swimming slowly back to the point break, I watched another swimmer spin silently across the next rushing wall. She rose too high and was thrown over with the lip of the wave. If she hit the crater reef and broke the seal of her suit, she would freeze instantly — but she knew that, and would be careful to avoid being forced too deep.

I radioed the shore and had them pipe Gregorian chants into my headphones; and I swam, and rode waves, and hummed with the chants when I could catch my breath, and thought not at all. And later I switched over to the common band, and talked at great length with Fist and Wendy and Laura, as we analyzed every wave and every ride. I swam till there was too much sweat in my suit, and not enough oxygen.

Back on the tram into town, I felt good: free and self-sufficient, cosmopolitan, ready to work. It was time to attack the next facet of the Icehenge problem: the identity of its builder. My research had given me a good idea of who it might be, but the problem would be to prove it — or even to make a convincing case. And the next day I checked my mail again, and there was a long rambling letter from Mark Starr. PRINT, I typed, and out of the slot in the side of the console it appeared, blue ink on gray paper, just as always.

One day I went down to Waystation’s News and Information Center in search of the latest Nederland press conference. The lobby of the center was nearly empty, and I went directly into a booth. The index I called up listed only Nederland’s regularly scheduled lectures, and I had to search through the new entries to find the press conference I wanted. Finally I discovered it and typed the code to run it, then sat back in the center chair of the booth to watch.

The room darkened. There was a click and I was in a large conference room, fully lit, filled with the holo images of upper-class Martians: reporters, students, officials (as in any Martian holo there were a lot of these), and some scientists I recognized. And there was Nederland, moving down an aisle next to me, toward a podium at the front. I moved through people and chairs to the aisle, and stood in front of Nederland. He walked right through me. Smiling at my little joke, and at my quick moment of involuntary fright at the unfelt collision, I said, “You’ll see me yet,” and kicked about until I relocated my chair.

Nederland reached the podium and the irregular percussion of voices died. He was a small man, and only his head showed over the podium’s top. Underneath his wild black hair was a look of triumph; his bright red cheeks were blazing with excitement. “You hopeless old romantic,” I said. “You’ve got something up your sleeve, you can’t fool me.”

He cleared his throat, his usual sign that he was taking over. “I think my statement will answer most of the questions you have today, so why don’t I start with that, and then we’ll answer any questions you might have.”

“Since when has it been any different?” I asked, but it was the only response. Nederland looked at his notes, looked up — his eyes crossed mine — and he extended a benedictory hand.

“The recent critics of the Davydov explanation claim that the Pluto monument is a modern hoax, and that in my work on the subject I have ignored the physical evidence. The absence of any disturbance in the regolith around the site, and our inability to find any signs of construction, are cited as facts which contradict or do not fit my explanation.

“I submit that it is the critics who are ignoring the physical evidence. If the Davydov expedition did not build Icehenge, why did Davydov himself study the megalithic cultures of Terra?”

“What?” I cried.

“What are we to make of his stated intention to leave some sort of mark on the world? Can we label it coincidence that Davydov’s ship disappeared just three years before the date found on Icehenge? I think not…”

He went on, outlining the same arguments he had been espousing for the last fifty years. “Come on,” I groaned, “get down to it.” He droned on, ignoring the fact that his critics had shown the whole Davydov story to be part of the hoax. “I know you’ve got something new up your sleeve, let’s see it.” Then he flipped over a notecard, and an involuntary smile creased his face. I sat forward.

“My critics,” he said in his high voice, “are simply attacking in a purely destructive way. Aside from the vague claim that the monument is a modern hoax — perpetrated by whom, they cannot say — there is no theory to replace mine, and nothing to explain away the evidence found in the archives on Mars—”

“Oh, my God, exactly wrong!”

“-Which are constantly being re-ordered and refiled.”

“Oh. You hope.”

“The general claim of people like Doya, Satarwal, and Jordan, is that there is nothing at the site which will prove Icehenge’s age. On the other hand, there is nothing there that shows the monument to be modern, either, which given the sophistication of dating methods there almost certainly would be, if it were indeed modern.

“In fact, there is now evidence conclusively proving that Icehenge cannot be modern.” He stopped to let the statement sink in. “You are all aware that micrometeors, the dusty debris of space, are continually falling on all the bodies of the solar system; and that when they fall on those bodies without an atmosphere, they leave small traces. Even the tiniest of fragments leave their mark. The fall of these micrometeors is regular, and is a constant throughout the system. Professor Mund Stallworth, of the university here, has received a grant from the Holmes Foundation, and he has done extensive work in this field. He has established rates of fall for different gravities, and thus a micrometeorite count can now be used as an accurate dating method. Professor Stallworth has made a detailed computer scan of the exposed faces of the liths, and of the surrounding grounds, which the builders swept clear, and the count as revealed in these holograms is such that he puts the date of the erection of Icehenge at a thousand years before present, plus or minus five hundred years. His paper on the subject will appear in the next issue of Marscience. In it he explains that it is impossible to be more precise given the short time spans involved, and the fact he worked with holograms only. This places the latest date of construction one hundred and fifty years or so before the date left on the Inscription Lith, but this may be explained by the fact that the smooth surfaces of the liths record a higher percentage of blemishes than other surfaces. In any case, it is impossible that so many micrometeorites could have fallen in the short amount of time postulated by those who think that Icehenge is part of a hoax.