On the tenth day of the siege small engines, such as covered catapults and ballistae, were flown across the ditches by tarn teams and soon were engaged in artillery duels with the engines mounted on the walls of Ar. Simultaneously, exposed chains of siege slaves began to move the stake lines forward. After some four days of bombardment, which probably had small effect, if any of the first assault was mounted.
It began several hours before dawn, as the giant siege towers, covered now with plates of steel to counter the effect of fire arrows and burning tar, were slowly rolled across the ditch bridges. By noon they were within crossbow range of the walls. After dark, in the light of torches, the first tower reached the walls. Within the hour three others had touched the first wall. Around these towers and on top of them warriors swarmed. Above them, tarnsman met tarnsman in battles to the death. Rope ladders from Ar brought defenders two hundred feet down the wall to the level of the towers. Through small postern gates other defenders rushed against the towers on the ground, only to be met by Pa-Kur's clustered support troops. From the height of the walls, some two hundred feet above the towers, missiles would be fired and stones cast. Within the towers, sweating, naked siege slaves, under the frenzied whips of their overseers, hauled on the great chains that swung the mighty steel rams into the wall and back.
One of Pa-Kur's towers was undermined, and it tilted crazily and they crashed into the dust, amidst the screaming of its doomed occupants. Another was captured and burned. But five more towers rolled slowly toward the walls of Ar. These towers were fortresses in themselves and would be maintained at all costs; hour in and hour out, they would continue their work, gnawing at the walls.
Meanwhile, at several points in the city and at randomly selected times, picked tarnsmen of Pa-Kur, each of whose tares carried a dangling, knotted rope of nine spearmen, dropped to the wires and the tops of cylinders, landing their small task forces of raiders. These task forces seldom managed to return, but sometimes they were outstandingly successful.
On the twentieth day of the siege there was great rejoicing in the camp of Pa-Kur, because in one place the wires had been cut and a squad of spearmen had reached the main siege reservoir, emptying their barrels of toxic kanda, a lethal poison extracted from one of Gor's desert shrubs. The city would now have to depend primarily on its private wells and the hope of rain. It seemed probable that food and water would soon be scarce in the city and that the Initiates, whose resistance had been unimaginative and who were apparently unable to protect the city, would be forced to face a hungry and desperate population.
The fate of Marlenus during these days was in doubt. I was certain that he had entered the city in some manner and was presumably waiting for his chance to strike at the Home Stones of the tributary cities, in order, if possible, to divide the horde of Pa-Kur. Then, in the fourth week of the siege, my heart fell. Marlenus and several men had entered the city, it seemed, but had been discovered — and sealed off in the very cylinder of the Home Stones — indeed, in that cylinder that had been his palace in the days of his glory.
Marlenus and his men apparently had command of the top floor and roof of the cylinder, but there was little hope he could use the Home Stones that now lay within his grasp. He and his men had no tarns, and their retreat was cut off. Moreover, the ubiquitous taro wire heavily netted in the area of the Central Cylinder would ward off any attempts at rescue, unless perhaps by a large force.
Pa-Kur, of course, was pleased to leave Marlenus precisely where he was, to be destroyed by the men of Ar. Also, Pa-Kur was not so much a fool as to bring the tributary Home Stones to his camp and risk disuniting his horde before the siege was completed. Indeed, it was probable that Pa-Kur had no intention of returning the Home Stones at all but was determined to follow in the imperial footsteps of Marlenus himself. I wondered how long Marlenus could hold out. It would surely depend, in part, on the food and water available and on the persistence of the Initiates' attempts to dislodge him. I was confident that there would be cisterns and canisters of water in the palace, and I supposed that Marlenus, as an enlightened precaution, in view of the unstable politics of Ar, would have outfitted his cylinder as a keep, laying in stores of food and missile weapons. At any rate, my plan for the division of the Home Stones had failed, and Marlenus, on whom I had depended, was, in the language of the game, neutralized if not removed from the board.
In despair, Kazrak and I discussed these matters over and over. The probability of Ar's resisting the siege was minimal. One thing at least remained to be done: there must be an attempt to rescue Talena. Another plan entered my head, but I dismissed it as too far-fetched, as unworthy of consideration. Kazrak noticed my frown and demanded to know what I had thought.
"The siege might be lifted," I said, "if a force could take Pa-Kur by surprise, a force of some thousands of warriors attacking from the unprotected side of the camp."
Kazrak smiled. "That is true. Where will you find the army?"
I hesitated for a moment, and then said, "Ko-ro-ba, perhaps Thentis."
Kazrak looked at me in disbelief. "Are you rid of your senses?" he asked. "The fall of Ar will be Ka-la-na wine to the free cities of Gor. When At falls, there will be rejoicing in the streets. When Ar falls, the bridges will be hung with garlands, there will be free Paga, slaves will be freed, enemies will pledge friendship."
"How long will it last," I queried, "with Pa-Kur on the throne of Ar?"
Kazrak seemed suddenly to darken with thought.
"Pa-Kur will not destroy the city," I said, "and he will keep as much of his horde as he can."
"Yes," said Kazrak. "There will be little cause for rejoicing."
"Marlenus had a dream of empire," I said, "but the ambition of Pa-Kur will yield only a nightmare of oppression and tyranny."
"It is unlikely that Marlenus will ever again be a danger," said Kazrak. "Even should he survive, he is outlawed in his own city."
"But Pa-Kur," I said, "as Ubar of Ar, will threaten all Gor."
"True," said Kazrak, looking at me questioningly.
"Why should not the free cities of Gor unite to defeat Pa-Kur?"
"The cities never unite," responded Kazrak.
"They never have," I said. "But surely, if Pa-Kur is to be stopped, this is the time, not after he is master of Ar."
"The cities never unite," repeated Kazrak, shaking his head.
"Take this ring," I said, giving him the ring that bore the crest of Cabot. "Show it to the Administrator of Ko-ro-ba and to the Administrator of Thentis and to the Ubars or Administrators of whatever cities you can. Tell them to raise the siege. Tell them they must strike now, and that you come with this message from Tarl Cabot, Warrior of Ko-ro-ba."
"I will probably be impaled," said Kazrak, rising to his feet, "but I will go."
With a heavy heart I watched Kazrak loop his sword belt over his shoulder and pick up his helmet. "Good bye, Sword Brother," he said, and turned and left the tent, as if he might have been merely going to the tharlarion corrals or to take his post for guard duty, as in our caravan days. I felt a choking sensation in my throat and asked myself if I had sent my friend to his death.
In a few minutes I gathered together my own gear and put on the heavy black helmet of the Assassin, left the tent, and turned my steps in the direction of the tents of Pa-Kur. I made my way to the interior perimeter of the second ditch, opposite the great gate of Ar in the distance. There, on a hillock overlooking the palisades that rimmed the rampart to the ditch, I saw the wall of black silk that surrounded the compound of Pa-Kur. Inside were the dozens of tents that formed the quarters for his personal retinue and bodyguard. Above them, at several places, flew the black banner of the Caste of Assassins.