"The tops of forests all look the same."

"Oh."

"You found Telemain," Cimorene said to Morwen. "Can't you use the same method to find a way out of here?"

"I could if there were any magic left to trace," Morwen said.

"Unfortunately, there isn't. Pick a direction."

"That way," said Cimorene, and they started off.

Walking through the swamp was hard work. With every step, the ankle-deep mud sucked at their feet. Twice, Cimorene almost lost one of her short leather boots, and even Kazul had difficulty making headway. The only one who had no problem was Killer. Telemain's added weight did not pull him down at all; his hooves stayed a dry six inches above the muck no matter what. Morwen found herself wondering a little sourly whether the donkey could walk across water the same way he did across the endless mud.

Around noon, Morwen passed out chicken-salad sandwiches to everyone.

Her sleeves had protected them from the mud, which was doubly fortunate since Cimorene's pack had leaked and the remains of breakfast were inedible. Unexpectedly, no one complained of a stomachache (though Killer complained about the taste of the lettuce and the bread), and the sandwiches disappeared rapidly.

When they finished eating, they went on. Morwen kept a close but unobtrusive eye on Telemain. Though he did not stir, he did not appear to grow any worse, either, which surprised her a little. She kept both her surprise and her worries to herself.

On and on they waded, until the shadows began to thicken as did the fog. Beads of moisture glistened on Kazul's scales, and the cats complained loudly of the damp. Morwen gave up trying to keep her glasses from clouding over. Telemain remained unconscious, and the worry line between Cimorene's eyebrows grew deeper.

"It'll be dark soon," Cimorene said at last. "We should find somewhere to camp. If there is anywhere. We haven't seen a dry spot since we got here.

Killer, where do you think you're going?"

"I'm hungry," Killer said. "If you're going to make me haul people around, the least you could do is let me eat. It's been a long time since lunch."

"There isn't anything to eat," Cimorene said.

"Not for you, maybe, but those things over there look edible to me."

"What things?" Feeling slightly annoyed, Morwen took off her glasses and began hunting for a clean patch of robe to wipe them on.

"Those things wrapped around the trees," Killer said, cocking a bright blue ear to his left. "The viney things with the silver leaves. There was one patch of clover back home that had saver leaves sometimes, and it was especially good. Sweet and tart at the same time, and quite strong."

"You're seeing things," Cimorene said. "There aren't any vines on those trees."

"There are, too. You must be looking in the wrong place. Here, I'll show-" Morwen shoved her glasses back onto her nose and snapped, "Killer, stop right where you are. Don't you take another step toward those vines of yours. If they're really there, they could be very dangerous."

Killer looked at her in disbelief. "They're just plants."

"Possibly. Kazul, do you see anything?"

"Trees, fog, and mud," the dragon replied. "Lots and lots of mud. And I agree with Cimorene. We should be trying to find somewhere to camp, not arguing about imaginary vines."

"Not imaginary," Morwen corrected. "Invisible. To be exact, invisible dusk-blooming chokevines." She peered at the trees, wishing she had time to collect one or two of them. Then she shook her head. Cimorene and Kazul were right, and they'd wasted enough time already.

"They don't look dangerous," Killer said stubbornly. "And I'm hungry."

"The last time you said that, you drank Morwen's wizard-melting water and turned blue," Scorn said.

"Quiet," said Trouble. "Go on, Killer. I would if I were you."

"You hush," said Morwen. "Keep away from those plants, Killer.

They're called 'chokevines' for a very good reason. Try to remember you're carrying Telemain, and avoid anything dangerous. And let us know if you see any more of those vines."

"Oh, there are patches of them all over," Killer said. "We've been walking by them for the last hour. You really can't see them at all? None of you?"

"I can," Trouble said.

Morwen gave him a look. "We'll discuss it later."

As she turned away, a soft globe of light blossomed from the side of one of the trees Killer had pointed out. "What on earth is that?"

Cimorene said.

Another light appeared, and another, and suddenly the swamp was full of ghostly radiance. "Invisible dusk-blooming chokevines, all right," Morwen said. "The sun must be setting."

"It's beautiful," Cimorene said. "How long will it last?"

"An hour, maybe two." As she spoke, Morwen moved to Killer's side to check on Telemain's condition once more. His color was no better, and the skin of his wrist was cold and clammy where she touched it to take his pulse. Of course, everything was cold and damp after hours of laboring through the mud. At least his pulse was strong.

"Will he be all right?" Cimorene asked, joining her.

"Probably," Morwen said with more confidence than she felt. The worst case of backshock she had ever seen prior to this trip had regained consciousness in a little over an hour. Telemain had already been out more than twice that long and showed no sign of awakening. Bouncing about on Killer's back should not have delayed his recovery that long.

"Look at the bright side," Scorn said. "As long as he's unconscious, he can't go on about things no one else understands."

Realizing that Cimorene and Kazul were watching her anxiously, Morwen shook herself. "What he really needs is warmth, rest, and a bowl of hot broth…"

"... and we aren't going to find them standing here," Cimorene finished for her. "Come on, Killer. We'd better keep moving while we can still see."

In one way, the next half hour of walking was easier than the last couple had been. The invisible dusk-blooming chokevines lit the swamp with a silvery glow, like the light of a hundred miniature moons. As the group went farther along, the vines grew more and more thickly, and their blossoms shone more and more brightly, until even the mud seemed to glisten like liquid silver. Not only was it pretty to look at, but it also made it much easier to see where they were stepping.

After a while, they paused to rest. Morwen checked on Telemain again, with no better results. Frowning, she turned away. If they didn't find somewhere dry and warm soon…

"Cimorene, Morwen," said Kazul, "look at these lights."

"I have been, all the time we were walking," Cimorene said. "They're useful as well as pretty."

"No, I mean look at them." Kazul stretched out her neck and swiveled her head from one side to the other. "They aren't just growing at random.

They're in rows."

Morwen studied the lights. "Not quite. The trees aren't in rows, so the vines can't be, either. But they're close."

"It's as if someone arranged them to light a path," Cimorene said after a moment. "I don't know if I like this."

"I do," Morwen said. "Paths lead somewhere. And if someone has gone to the trouble of lighting this one up, there's a good chance it leads somewhere useful."

"In that case, why didn't they pave it?"

"Maybe they like mud. Come on, we've only got another hour or so before the lights go out."

With renewed energy, they went on. Less than a quarter of an hour later, they reached a dead end. The invisible dusk-blooming chokevines covered the trees on either side and hung in swirls of glowing silver across the trunks ahead. The only way out was the way they had come.

"Useful, huh?" said Scorn.

"This doesn't make any sense," said Cimorene. "Why would anyone make a path that leads nowhere?" She drew her sword, eyeing the vines doubtfully. "Can we cut our way through, do you think?"