A man's hoarse scream rose above the flying echoes. The riders turned and fled suddenly, the squealing, hissing beasts crowding each other, floundering wildly on the rocks of the cairn, stampeding back into the pass.
Ciara was left alone. Stark saw her fight the rearing beast she rode and then flung herself out of the saddle and let it go. She came toward him, running, clad all in her black armor, the great axe swinging high.
"Behind you, Stark! Oh, gods of Mars!"
He turned then and saw them, coming out from the tower of stone, the pale, shining creatures that move so swiftly across the ice, so fleet and swift that no man living could outrun them.
* * * * *
He shouted to Ciara to turn back. He drew his sword and over his shoulder he cursed her in a black fury because he could hear her mailed feet coming on behind him.
The gliding creatures, sleek and slender, reedlike, bending, delicate as wraiths, their bodies shaped from northern rainbows of amethyst and rose—if they should touch Ciara, if their loathsome hands should touch her....
Stark let out one raging catlike scream, and rushed them.
The opalescent bodies slipped away beyond his reach. The creatures watched him.
They had no faces, but they watched. They were eyeless but not blind, earless, but not without hearing. The inquisitive tendrils that formed their sensory organs stirred and shifted like the petals of ungodly flowers, and the color of them was the white frost-fire that dances on the snow.
"Go back, Ciara!"
But she would not go, and he knew that they would not have let her. She reached him, and they set their backs together. The shining ones ringed them round, many feet away across the ice, and watched the long sword and the great hungry axe, and there was something in the lissome swaying of their bodies that suggested laughter.
"You fool," said Stark. "You bloody fool."
"And you?" answered Ciara. "Oh, yes, I know about Balin. That mad girl, screaming in the palace—she told me, and you were seen from the wall, climbing to the Gates of Death. I tried to catch you."
"Why?"
She did not answer that. "They won't fight us, Stark. Do you think we could make it back to the cairn?"
"No. But we can try."
Guarding each others' backs, they began to walk toward Ban Cruach and the pass. If they could once reach the barrier, they would be safe.
Stark knew now what Ban Cruach's wall of force was built against. And he began to guess the riddle of the Gates of Death.
The shining ones glided with them, out of reach. They did not try to bar the way. They formed a circle around the man and woman, moving with them and around them at the same time, an endless weaving chain of many bodies shining with soft jewel tones of color.
They drew closer and closer to the cairn, to the brooding figure of Ban Cruach and his sword. It crossed Stark's mind that the creatures were playing with him and Ciara. Yet they had no weapons. Almost, he began to hope....
From the tower where the shimmering cloud of darkness clung came a black crescent of force that swept across the ice-field like a sickle and gathered the two humans in.
Stark felt a shock of numbing cold that turned his nerves to ice. His sword dropped from his hand, and he heard Ciara's axe go down. His body was without strength, without feeling, dead.
He fell, and the shining ones glided in toward him.
VIII
Twice before in his life Stark had come near to freezing. It had been like this, the numbness and the cold. And yet it seemed that the dark force had struck rather at his nerve centers than at his flesh.
He could not see Ciara, who was behind him, but he heard the metallic clashing of her mail and one small, whispered cry, and he knew that she had fallen, too.
The glowing creatures surrounded him. He saw their bodies bending over him, the frosty tendrils of their faces writhing as though in excitement or delight.
Their hands touched him. Little hands with seven fingers, deft and frail. Even his numbed flesh felt the terrible cold of their touch, freezing as outer space. He yelled, or tried to, but they were not abashed.
They lifted him and bore him toward the tower, a company of them, bearing his heavy weight upon their gleaming shoulders.
He saw the tower loom high and higher still above him. The cloud of dark force that crowned it blotted out the stars. It became too huge and high to see at all, and then there was a low flat arch of stone close above his face, and he was inside.
Straight overhead—a hundred feet, two hundred, he could not tell—was a globe of crystal, fitted into the top of the tower as a jewel is held in a setting.
The air around it was shadowed with the same eerie gloom that hovered outside, but less dense, so that Stark could see the smouldering purple spark that burned within the globe, sending out its dark vibrations.
A globe of crystal, with a heart of sullen flame. Stark remembered the sword of Ban Cruach, and the white fire that burned in its hilt.
Two globes, the bright-cored and the dark. The sword of Ban Cruach touched the blood with heat. The globe of the tower deadened the flesh with cold. It was the same force, but at opposite ends of the spectrum.
Stark saw the cryptic controls of that glooming globe—a bank of them, on a wide stone ledge just inside the tower, close beside him. There were shining ones on that ledge tending those controls, and there were other strange and massive mechanisms there too.
Flying spirals of ice climbed up inside the tower, spanning the great stone well with spidery bridges, joining icy galleries. In some of those galleries, Stark vaguely glimpsed rigid, gleaming figures like statues of ice, but he could not see them clearly as he was carried on.
He was being carried downward. He passed slits in the wall, and knew that the pallid lights he had seen through them were the moving bodies of the creatures as they went up and down these high-flung, icy bridges. He managed to turn his head to look down, and saw what was beneath him.
The well of the tower plunged down a good five hundred feet to bedrock, widening as it went. The web of ice-bridges and the spiral ways went down as well as up, and the creatures that carried him were moving smoothly along a transparent ribbon of ice no more than a yard in width, suspended over that terrible drop.
Stark was glad that he could not move just then. One instinctive start of horror would have thrown him and his bearers to the rock below, and would have carried Ciara with them.
Down and down, gliding in utter silence along the descending spiral ribbon. The great glooming crystal grew remote above him. Ice was solid now in the slots of the walls. He wondered if they had brought Balin this way.
There were other openings, wide arches like the one they had brought their captives through, and these gave Stark brief glimpses of broad avenues and unguessable buildings, shaped from the pellucid ice and flooded with the soft radiance that was like eerie moonlight.
At length, on what Stark took to be the third level of the city, the creatures bore him through one of these archways, into the streets beyond.
* * * * *
Below him now was the translucent thickness of ice that formed the floor of this level and the roof of the level beneath. He could see the blurred tops of delicate minarets, the clustering roofs that shone like chips of diamond.
Above him was an ice roof. Elfin spires rose toward it, delicate as needles. Lacy battlements and little domes, buildings star-shaped, wheel-shaped, the fantastic, lovely shapes of snow-crystals, frosted over with a