Peter dared pluck only five threads from each napkin the first year-fifteen threads each day. He kept them under his mattress, and at the end of each week, he had one hundred and five. In our measure, each thread was about twenty inches long.
He wove the first batch a week after he received the dollhouse, working carefully with the loom. Using it was not as easy at seventeen as it had been at five. His fingers had grown; the loom had not. Also, he was horribly nervous. If one of the warders caught him at his work, he could tell them he was using the loom to weave errant threads from the old napkins for his own amusement... if they believed it. And if the loom worked. He wasn't sure that it would until he saw the first slim cable, per-fectly woven, emerging from the loom's far end. When Peter saw this, his nervousness abated somewhat and he was able to weave a little faster, feeding the threads in, tugging them to keep them straight, operating the foot pedal with his thumb. The loom squeaked a little at first, but the old grease soon limbered up and it ran as perfectly as it had in his childhood.
But the cable was terribly thin, not even a quarter of an inch through the center. Peter tied off the ends and tugged experi-mentally. It held. He was a little encouraged. It was stronger than it looked, and he thought it should be strong. They were royal napkins, after all, woven from the finest cotton thread in the land, and he had woven tightly. He pulled harder, trying to guess how many pounds of strain he was putting on the slim cotton cable.
He pulled even harder, the rope still held, and he felt more hope come stealing into his heart. He found himself thinking about Yosef.
It had been Yosef, head of the stables, who told him about that mysterious and terrible thing called "breaking strain." It was high summer, and they had been watching huge Anduan oxen pull stone blocks for the plaza of the new market. A sweat-ing, cursing drover sat astride each ox's neck. Peter had then been no more than eleven, and he thought it better than a circus. Yosef pointed out that each ox wore a heavy leather harness. The chains that pulled the dressed blocks of stone were attached to the harness, one on each side of the animal's neck. Yosef told him the cutters had to make a careful estimate of just how much each block of stone weighed.
"Because if the blocks are too heavy, the oxen might hurt themselves trying to pull them," Peter said. This wasn't even a question, because it seemed obvious to him. He felt sorry for the oxen, dragging those great blocks of rock.
"Nay," Yosef said. He lit a cigarette made of cornshuck, al-most burning off the end of his nose, and drew deeply and contentedly. He always liked the young prince's company. "Nay! Oxen aren't stupid-people only think them so because they are large and tame and helpful. Says more about the people than about the oxen, if you ask me, but leave that b'hind, leave that b'hind.
"If an ox can pull a block, he'll pull it; if he can't, why, he'll try twice and then stand with 'is head down. And he'll stand so, even if a bad master whups his hide to ribbons. Oxen look stupid, but they ain't. Not a bit."
"Then why do the cutters have to guess at the weight of the blocks they cut, if the ox knows what he can pull and what he can't?"
"T'ain't the blocks; it's the chains." Yosef pointed to one of the oxen, which was dragging a block that looked to Peter almost as big as a small house. The ox's head was down, its eyes fixed patiently ahead, as its drover sat astride it and guided it with little taps of his stick. At the end of the double length of chain, the block moved slowly along, goring a furrow in the earth. It was so deep that a small child would need to work to climb out of it. "If an ox can pull a block, he will, but an ox don't know nothing about chains, or about the breaking strain."
"What's that?"
"Put a thing under enough of a tug, and it'll snap," Yosef said. "If yonder chains were to snap, they'd fly around something turrible. You wouldn't want to be a witness to what can happen if a heavy chain lets go when it's under such a tug as those oxen can put on. It's apt to fly anywhere. Back'rds, mostly. Apt to hit the drover and tear him apart, or cut the legs from under the beast itself."
Yosef took another drag at his makeshift cigarette and then tossed it in the dirt. He fixed Peter with a shrewd, friendly glare.
"Breaking strain," he said, "is a good thing for a prince to know about, Peter. Chains break if you put on enough of a tug, and people do, too. Keep it in mind."
He kept it in mind now, as he pulled at his first cable. How much of a "tug" was he putting on? Five rull? At least. Ten? Perhaps. But maybe that was only wishful thinking. He would say eight. No, seven. Better to make a mistake on the pessimistic side, if a mistake was to be made. If he miscalculated... well, the cobblestones in the Plaza of the Needle were very, very hard.
He tugged harder still, the muscles on his arms now beginning to stand out a little. When the first cable finally snapped, Peter guessed he might be applying as much as fifteen roll-almost sixty-four pounds-of tug.