These matters are a question of science, the suns and moons acting together producing spring tides, the neap tides falling about a lunar quarter later. With seven moons acting with and against one another and the two suns, for this purpose calculated as a single gravitational source, the possibilities were fascinating, susceptible to interesting calculation and extremely fraught. The Todalpheme earned their inviolability from the crude external pressures of Kregen. I had much to occupy my mind as we jogged on. Duhrra had been measured up for his hook and the doctors had pursed their lips over his stump, commenting acidly on the butchery of whoever had amputated. Duhrra had thrown me a comical glance and I had told the story, which brought forth, as I had expected, a genuine desire to overcome the handicap of botched work. If they had deemed it necessary to amputate further they would have. Luckily for Duhrra — and me — they did not. So, in the fullness of time, we came in sight of the Dam of Days.
How to describe it?
In rhapsodic terms, glowingly referring to the size, the splendor, the majesty? In scientific terms, the cubic volumes enclosed, the tons of water passing, the mechanisms of the caissons? In economic terms, for although electricity was not generated here — and I knew nothing of it then — the megawatts available would have lit up the inner sea.
In artistic terms, when the suns shone on the stone facings of the rock fill and glowed with all the flowerlike glory of an Alpine garden?
The Dam stretched across the mouth of the canal, which had widened into the bay. The bay enclosed a vast sheet of water. The Dam towered in size, rising to a stupendous height, and yet, when the eye’s gaze traveled along the length, from headland to headland, the Dam appeared a long low wall against the sea. I think a Hollander would have appreciated that great work, or any man who has worked on a dam, anyone, actually, who had heart and imagination for the work of man’s hands. The Dam had been built by the Sunset People in the long ago. Now I had learned — on Earth, on Earth! — that the Savanti of Aphrasoe were the last remnants of that once proud and world-girdling peoples. They had built well and to last. Yet their cities were tumbled into ruin in many places of Kregen; in the Kharoi Stones of my island of Hyr Khor in Djanduin were to be seen the fragmented particles of their glory. Yet the Grand Canal and the Dam of Days glowed with the newness of building. The Sunset People had loved them.
'You see the waterfall, tumbling down into the sea by the northern headland, Tyr Dak?' The young Todalpheme pointed. He was a novice, learning his trade. In a hundred years, perhaps less if he was astute, he might become Akhram. I nodded. The waterfall fell into the sea and beyond it, inland, there was the glitter of a lake.
'When the tide rises the water fills the lake, so the river has merely to top it up. That is the reservoir from which comes the power of the Dam of Days.'
We jogged on. Camped on a wide flat area rose the tents and huts of a sizable force. They were Grodnims. Duhrra hugged his detested green robes closer to him. I knew that we stood in some real danger of being accosted as slaves or runaway slaves, and was ready to be unpleasant in any event to any damned Overlord.
The three Todalpheme, although entirely unconcerned for they were secure in their immunity, angled away before we crossed the Dam. They were upset that naked force had been used here, where the pure light of science, as they said, should reign supreme. I could tell them about science, thinking back to my frustrating experiences on Earth during that twenty-one years of torment. I could also tell them about the uses of naked force.
Across the Dam the vistas were immense. On our right hand the greenly gray sea heaved away to a wild horizon. The gale was surely coming. On our left hand the waters, although separated only by the bulk of the Dam, yet showed the bluer color of the inner sea. We crossed halfway and stood for a while, lolling on the high parapet, looking around, marveling, silent. At intervals the Dam of Days was pieced by openings. They were arranged to resist the push of water from east and west and not from one side only like a lock-gate. They were fashioned in the form of gigantic cylinders rising and falling in open masonry guides. A modern analogy I can now give is to liken them to pistons. When water from the lake was introduced from valved pipes they sank and so effectively blocked the openings. The lifting of these caissons, although essentially simple, demanded a level of technology beyond that of the current manipulators. That only one caisson rope of steel wire had ever broken is a tribute to the building of the Sunset People. Next to each caisson in the Dam was sited an enormous reservoir tank. This was free to move up and down in guides. Many steel cables passed over central pulleys from caisson to tank. When the tank was filled with water from a separate valved and piped supply from the lake, it would descend. Because the tank size was greater than the amount of caisson under the sea level, the tank would haul the caisson up as it sank. Vents in the caisson valved open to let the water run out. Because the caisson, when high and empty, was itself larger than the amount of water left in the tank after that level equaled the sea level, the caissons would fill and sink, thus hauling up the tanks. All very neat and economical, the power being supplied by gravity through the falling water. Finally, I should say that the Oblifanters kept hordes of workpeople busy greasing everything to ensure that it ran sweetly. To allow the caissons to move up and down their guides against the enormous differential of water pressure, a whole series of wheels were fitted on each side, to resist pressure front and back.
This made me think. The Todalpheme gave their orders to lower or lift the caissons to regulate the level of water flowing into the inner sea. Usually the high tides would cause them to close the gates. Why should the Sunset People bother to arrange wheels to resist pressure from the back of the dam? I suspected that in those long-gone days the dam was employed for more than merely regulating the tides. One of the young Todalpheme novices shaded his eyes, looking out to sea. 'I believe. .' he said, pointing. I looked.
This young Todalpheme was used to poring over papers indoors. My old sailor’s eye picked out the familiar shapes. Argenters, their sails board-stiff, riding the brushing skirts of the gale, rushed headlong through the tumbling whitecaps. I studied them, the wind in my face, wondering how many of them would smash to pieces before they negotiated the gates of the dam.
I saw the flags fluttering.
Four green diagonals and four blue diagonals slanting from right to left, the blue and green divided by thin borders of white.
Menaham.
That made perfect sense.
When mad Queen Thyllis, as she was then, had invaded the island of Pandahem she had overrun country after country until her victorious armies and air service had been stopped in the Battle of Jholaix. Of all the nations of Pandahem she had made allies of the Menahem. I had remorseful memories of my treatment of young Pando, the Kov of Bormark, and his mother, Tilda the Fair. They lived side by side with the people of Menaham, and they called them the Bloody Menahem. Even when Thyllis of Hamal had been forced back, made to conclude a peace with Vallia and those nations of Pandahem she had overrun, still she continued the alliance with the Bloody Menahem. Hamal possessed few ships. Pandahem was an island center of commerce, as was Vallia. So what was more natural than that Hamal should use ships from Menaham?
If you ask why bother to use large, slow argenters to transport vollers when they might fly, you forget the ways of Hamal, the cunning of those cramphs of Hamal and their treacherous vollers. I knew well enough that the fliers in those ships would work well for a while and then break down. Oh, yes, I knew that!
Would the Hamalians risk a flight from Hamal to the inner sea in suspect vollers?
And, of course, Genod Gannius, like us in Vallia, would be so anxious to lay his hands on fliers he would accept the probable defects as part of the price he must pay. This was what Vallia had done, what Zenicce and all the others who bought vollers from Hamal had done. Otherwise, no fliers. So I stood no longer lolling on the high parapet-walk watching those ships standing in. They were handled smartly enough and they negotiated the wide openings superbly. They rode the waves like great preening swans. All their flags fluttering, the sails cracking and billowing as the hands braced the yards around, the ships aimed for the gaps, the white water spuming away from their forefeet. They breasted the waves and sailed through the Dam of Days into the bay leading to the Grand Canal. I walked across to the other side of the dam and watched them, their motion much easier in the enclosed water. They made straight for the canal. They would probably lie up in the harbor halfway through, or in the harbor at the eastern end, depending on circumstances. Then the vollers would be brought up from those capacious holds. The air service men from Hamal would give them a final check and hand them over. No doubt Genod Gannius had made arrangements for his men to be trained in their use. And then. .
I had an apocalyptic vision of hordes of Grodnims descending from the skies, first to smash all resistance in Shazmoz, then other cities along the red southern shore, then on and on, razing Zy, on and on, finally taking Holy Sanurkazz.
