of the opposite pier. "The nave is two poles wide." He turned it over again, and it reached to the wall of the far aisle. "The whole church is four poles wide."
"Yes," said Jack. "And each bay must be a pole long."
Tom looked faintly annoyed. "Who told you that?"
"Nobody. The bays of the aisles are square, so if they're a pole wide they must be a pole long. And the bays of the nave are the same length as the bays of the aisles, obviously."
"Obviously," said Tom. "You should be a philosopher." In his voice was a mixture of pride and irritation. He was pleased that Jack was quick to understand, irritated that the mysteries of masonry should be so easily grasped by a mere boy.
Jack was too caught up in the splendid logic of it all to pay attention to Tom's sensitivities. "The chancel is four poles long, then," he said. "And the whole church will be twelve poles when it's finished." He was struck by another thought. "How high will it be?"
"Six poles high. Three for the arcade, one for the gallery, and two for the clerestory."
"But what's the point of having everything measured by poles? Why not build it all higgledy-piggledy, like a house?"
"First, because it's cheaper this way. All the arches of the arcade are identical, so we can reuse the falsework arches. The fewer different sizes and shapes of stone we need, the fewer templates I have to make. And so on. Second, it simplifies every aspect of what we're doing, from the original laying-out-everything is based on a pole square-to painting the walls-it's easier to estimate how much whitewash we'll need. And when things are simple, fewer mistakes are made. The most expensive part of a building is the mistakes. Third, when everything is based on a pole measure, the church just looks right. Proportion is the heart of beauty."
Jack nodded, enchanted. The struggle to control an operation as ambitious and intricate as building a cathedral was endlessly fascinating. The notion that the principles of regularity and repetition could both simplify the construction and result in a harmonious building was a seductive idea. But he was not sure whether proportion was the heart of beauty. He had a taste for wild, spreading, disorderly things: high mountains, aged oaks, and Aliena's hair.
He ate his dinner ravenously but quickly, then he left the village, heading north. It was a warm early-summer day, and he was barefoot. Ever since he and his mother had come to live in Kingsbridge for good, and he had become a worker, he had enjoyed returning to the forest periodically. At first he had spent the time getting rid of surplus energy, running and jumping, climbing trees and shooting ducks with his sling. That was when he was getting used to the new, taller, stronger body he now had. The novelty of that had worn off. Now when he walked in the forest he thought about things: why proportion should be beautiful, how buildings stayed standing, and what it would be like to stroke Aliena's breasts.
He had worshiped her from a distance for years. His abiding picture of her was from the first time he had seen her, as she came down the stairs to the hall at Earlscastle, and he had thought she must be a princess in a story. She had continued to be a remote figure. She talked to Prior Philip, and Tom Builder, and Malachi the Jew, and the other wealthy and powerful people of Kingsbridge; and Jack never had a reason to address her. He just looked at her, praying in church or riding her palfrey across the bridge, or sitting in the sun outside her house; wearing costly furs in winter and the finest linen in summer, her wild hair framing her beautiful face. Before he went to sleep he would think about what it would be like to take those clothes off her, and see her naked, and kiss her soft mouth gently.
In the last few weeks he had become dissatisfied and depressed with this hopeless daydreaming. Seeing her from a distance and overhearing her conversations with other people and imagining making love to her were no longer enough. He needed the real thing.
There were several girls his own age who might have given him the real thing. Among the apprentices there was much talk about which of the young women in Kingsbridge were randy and exactly what each of them would let a young