Dura slid through the leaves and came to rest close to him. The subdued shadow-light of the tree picked out the curves of her face. She smiled at him, looking self-conscious. "Don't worry about it," she said, quietly enough that the others couldn't hear. "I know how you feel. I was the same, the first time I came up here."

Farr frowned. Reluctantly he released the branch and pushed himself away. "You were? But I feel as if — as if I'm about to be pulled out of this tree..."

"It's called being frightened of falling."

"But that's ridiculous. Isn't it?" To Farr, "falling" meant losing your grip on the Magfield when Waving. It was always over in a few mansheights at the most — the tiny resistance of the Air and the currents induced in your skin soon slowed you down. Nothing to fear. And then you could just Wave your way around the Magfield to where you wanted to get to.

Dura grinned. "It's a feeling as if..." She hesitated. "...as if you could let go of this tree, right now, and not be able to stop yourself sliding down, across the Magfield and across the vortex lines, faster and faster, all the way to the Sea. And your belly clenches up at the prospect."

"That's exactly it," he said, wondering at how precise her description was. "What does it mean? Why should we feel like that?"

She shrugged, plucking at a leaf. The heavy plate of flesh came free of its attaching branch with a sucking sound. "I don't know. Logue used to say it's something deep inside us. An instinct we carried with us, when humans were brought to this Star."

Farr thought about that. "Something to do with the Xeelee."

"Perhaps. Or something even older. In any event, it's not something you need to worry about. Here." She held out the leaf toward him.

He took it from her cautiously. It was a bronze-gold plate, streaked radially with purple and blue, about as wide as a man's hand. It was thick and pulpy — springy between his fingers — and, like the wood, was warm to the touch, although, away from its parent branch, it seemed to be cooling rapidly. He turned it over, prodding it with a fingertip; its underside was dry, almost black. He looked up at Dura. "Thanks," he said. "What shall I do with it?"

She laughed. "Try eating it."

After a cautious inspection of her face to make sure this wasn't some kind of joke — Dura didn't usually play tricks on him; she was a little too serious for that... but you never knew — Farr lifted the leaf to his lips and bit into it. The flesh of the leaf was thin, surprisingly insubstantial, and it seemed to melt against his tongue; but the taste it delivered was astonishingly sweet, like the meat of the youngest Air-piglet, and Farr found himself cramming his mouth.