At times, when a pair of disks rolled together, their black spots, or holes, might develop simultaneously and sometimes overlapped. On one occasion, when three disks rolled in unison, black spots grew on each of the three, and by some freak, they were superimposed. Shimrod squinted through the aligned holes as the disks rolled past; to his surprise he saw flickering lines of fire, like far lightning. The black holes disappeared; the disks parted company, to roll their separate courses as before.

Shimrod stood back in contemplation of Lucanor. The device undoubtedly served a serious purpose-but what? He could arrive at no sensible theory. Perhaps he should bring Lucanor to the attention of Murgen. Shimrod temporized, since he would far prefer to resolve the puzzle himself. Three of Tamurello's ledgers remained to be deciphered; there might be a reference to Lucanor in one or another of the tomes.

Shimrod returned to his work, but continued to watch the seven disks, causing him such distraction that at last he put a low-order sandestin on watch for unusual coincidences, and then took Lucanor to a far corner of the workroom.

The days passed; Shimrod found no reference to Lucanor in the ledgers, and gradually lost interest in the disks. One morning, Shimrod took himself to his workroom as usual. Almost as soon as he passed through the door, the sandestin monitor called out an alarm: "Shimrod! Attend your disks! Five roll together in congruence!"

Shimrod crossed the room on swift strides. He looked down in something like awe. For a fact, five of the disks had joined to roll as one around the periphery of the tablet. Further, the disks showed no disposition to separate. And what was this? A sixth disk came rolling to overtake the five, and as Shimrod watched, it edged close, shuddered, merged into place with the others.

Shimrod watched in fascination, certain that he was witnessing an important event or, more likely, the representation of such an event. And now the seventh and last disk came to join the others, and the seven rolled as one. The single disk changed in color, to become marbled maroon and purple-black; it rolled lethargically, and showed no disposition to break apart. At the center a black spot grew dense and large. Shimrod bent to look through the hole; he saw what appeared to be a landscape of black objects outlined in golden fire.

Shimrod jerked away from Lucanor and ran to his workbench. He struck a small silver gong and waited, looking into a round mirror. Murgen failed to acknowledge the signal. Shimrod struck the gong again, more sharply. Again: no effect.

Shimrod stood back, face drawn into lines of concern. Murgen occasionally went to walk on the parapets. Infrequently, he left Swer Smod, sometimes by reasons of urgency, sometimes for sheer frivolity. Usually he notified Shimrod of his movements.

Shimrod struck the gong a third time. The result was as be fore: silence.

Troubled and uneasy, Shimrod turned away, and went back to stare at Lucanor.

III

Along the crest of the Teach tac Teach, from the Troagh in the south to the Gwyr Aig Rift in the north, a line of crags stood in a stern sequence, each more harsh and forbidding than the next. At about the center Mount Sobh raised a trapezoidal jut of granite high to split the passing clouds; Arra Kaw, next to the north, was if anything even more harsh and desolate.

Where the high moors broke against the base of Arra Kaw five tall dolmens, the ‘Sons of Arra Kaw', stood in a circle, enclosing an area forty feet in diameter. Where the westernmost stone gave a measure of protection against the wind, a rude hut had been built, of stones and sod. Clouds raced across the sky, passing in front of the sun to send shadows fleeting across the dun moors. Wind blew through gaps between the five Sons, creating a soft wailing sound which sometimes throbbed and fluttered to the changing force and direction of the wind.

Before the hut a small fire burned fitfully below an iron kettle which hung from a spindly tripod. Beside the fire stood Torqual, looking bleakly down into the blaze. Melancthe, impassive, if somewhat wan, and wrapped in a heavy brown cloak, knelt across from Torqual, stirring the contents of the kettle. She had cut her hair short and wore a soft leather casque which clasped her glossy dark curls close to her face.

Torqual thought he heard a calling voice. He jerked around, cocked his head to listen. He turned to Melancthe, who had raised her head. Torqual asked: "Did you hear the call?"

"Perhaps."

Torqual went to a gap between the Sons and peered out across the moors. Ten miles to the north the crag known as Tangue Fna reared even higher and more steeply than Arra Kaw. Between the two crags spread high moors, dappled by moving cloud shadows. Torqual saw a hawk, sliding eastward down the wind. As he watched, the hawk uttered a wild cry, almost inaudible.

Torqual allowed himself to relax, reluctantly, so it seemed, as if he were not averse that someone should dare attack him. He turned back toward the fire, and halted in frowning puzzlement. Melancthe, her face rapt, had risen to her feet and was walking slowly toward the hut. In the gloom behind the doorway Torqual was startled to observe the shape of a woman. Torqual stared. Was his mind playing hith tricks? The shape seemed not only nude, but also distorted, insubstantial and illuminated as if by a dim green glow.

Melancthe, on stiff legs, stepped into the hut. Torqual started to follow, but halted by the fire to stand irresolute, wondering if he had seen correctly. He listened. For a moment the wind ceased its noise and from the hut he seemed to hear the murmur of voices.

The situation could no longer be ignored. Torqual started for the hut, but before he could take three steps Melancthe emerged, walking with a firm step and carrying a short-handled implement formed of greenish-silver metal which Torqual had never seen before. He took it to be an ornamental hatchet, or a small halberd with a complex blade to one side and a four-inch spike to the other. A similar spike protruded from the tip. Melancthe approached the fire, walking with a slow and measured tread, her face stern and somber. He watched her come with dour suspicion; this was not Melancthe as he knew her! Something untoward had occurred.

Torqual spoke curtly: "Who is the woman in the hut?"

"There is no one there."

"I heard voices and I saw a woman. Perhaps she was a witch, since she lacked both substance and clothing."

"So it may be."

"What is that~weapon, or tool, you are carrying?"

Melancthe looked at the implement as if seeing it for the first time. "It is a hatchet thing."

Torqual held out his hand. "Give it to me."

Melancthe, smiling, shook her head. "The touch of the blade would kill you."

"You touch it and you are not dead."

"I am inured to green magic."

Torqual went on long strides to the hut. Melancthe watched impassively. Torqual looked into the gloom: right, left, up and down, but discovered nothing. He returned thoughtfully to the fire. "The woman is gone. Why did you speak with her?"

"The whole story must wait. As of this instant, I can tell you this: an event of importance has occurred, for which plans have long been made. You and I must go now to do what needs to be done."

Torqual said harshly: "Speak in clear terms, if you please, and leave off your riddles!"

"Exactly so! You shall hear not riddles, but definite orders." Melancthe's voice was heavy and strong; she stood with head thrown back, eyes showing a green glitter. "Arm yourself and bring up the horses. We leave this place at once."

Torqual glowered across the fire. He controlled his voice with an effort. "I obey neither man nor woman. I go where I choose, and do only as I find needful."

"The need has come."