But other plants caused more trouble. A firecrown landed on the dragon's head, heating it uncomfortably; a fishhook cactus hooked into several toes; a mountain rose grew in front, rising into a small red mountain, blocking the way while it continued to smell as sweet as its cousins by other names. A rattlesnake plant rattled, hissed, and struck at the dragon's nose; a star cluster heated the dragon's scales with a number of little burning stars; and scrub oak used little brushes to scrub at exposed anatomy. That merely tickled the monster.

  "This small stuff is only slowing the thing," Grundy said.

  "You need stronger medicine."

  "Well, I don't have any new seeds sorted yet!" Irene fussed.

  "I don't want to risk random seeds."

  The dragon shook off the last of the nuisance plants and fired a jet of steam. Chem danced aside, but Irene felt the heat of the blast. The golem was right; she needed stronger stuff and soon, or they would be in deep trouble. But a tangle tree was too strong. She would have to gamble on some unclassified stock.

  She nerved herself and threw out a random seed. "Grow!"

  The seed sprouted into a huge tree that soon made everything else look relatively small. "Oh, that's a dwarf yew plant," Irene said. But the dragon simply whomped around it, undwarfed.

  She tossed out another. It grew a number of cylindrical red fruits, and these exploded as the dragon passed, startling it. "A firecracker plant," Irene said, recognizing it.

  A third plant looked like a fern, but it soon uprooted itself and walked away. "Walking fern," Irene said. "Oh, I'm wasting some fine seeds here! If only I had time to classify them, so I knew what they all were, I could do something effective!"

  "Let me talk to them," Grundy said. "Maybe I can find a good one."

  Frustrated, but unable to offer anything better, Irene let the golem put his little hand in the bag of seeds and draw out individual ones to query. She hadn't realized he could talk to seeds, but of course he could communicate with anything living. Still this took time, for he could only query one at a time, and the dragon was close.

  Chem kept retreating, able to outrun the monster, but the Gorgon was afoot and having trouble. There wasn't room for her on Chem, along with Irene, Grundy and the bag of seeds; she was more solid than Zora Zombie had been. The dragon tended to go for whoever was closest. They had to get her out of danger, or she would be forced to lift her veil in self-defense and turn the dragon to stone.

  Irene looked anxiously about. To the side was the base of a fairly steep slope covered with vegetation. That would be easier to hide in. "There!" she cried, pointing.

  They hurried to the slope. Chem's legs plunged through the layered herbiage, seeking firm footing beneath. Vines and brambles abounded. The Gorgon had trouble, too. But maybe, Irene hoped, this would impede the progress of the dragon. Once it stopped trying to devour them, Grundy would be able to talk to it.

  Chem reached out to grab the Gorgon's arm, helping her to scramble over the slope. "Oops!" the Gorgon cried. "My veil's snagged on a bramble! Close your eyes!"

  Irene closed her eyes and looked away just to be safe. This was a very poor time to be without sight, but such a warning had to be heeded! She knew the others were doing likewise. She heard the angry hissing of the little snakes that were the Gorgon's hair; they didn't like being shaken up.

  In a moment the Gorgon announced that her veil was back in places Irene opened her eyes, looked back--and saw the dragon almost within steaming range. "Grow!" she cried to the vegetation between them and the dragon.

  It grew. Oh, how it grew! The brambles become enormous and twice as tangly as before, and the vines threaded themselves into new layers of complexity. They twined up around the dragon, using it as support for their competitive rising toward the sun. In moments the dragon looked like a boulder clothed in vines.

  The reptile didn't like this. It thrashed its powerful tail, snapping vines as if they were so many cotton threads. It steamed, making the green leaves wilt. It whomped forward, flattening multiple layers into one layer. The vegetation was no match for it.

  "That's one tough dragon!" Irene murmured.

  "The toughest," Chem agreed, struggling to stay out of steam range. She was panting, expending a lot of energy to move up the difficult slope, and so was the Gorgon. "I was (puff!) present when Smash the Ogre (puff!) fought it in the Gap Chasm nine years ago. (Puff!) It was an even contest."

  "An ogre is stronger than a dragon, weight for weight," Irene said.

  "In most cases," Chem agreed noncommittally.

  The dragon made another whomp. Now it was within steaming range. It pumped up its body, making ready to issue the definitive blast.

  "I've got it!" Grundy cried. "A dragnet seed!"

  Irene snatched the seed as adeptly as any harpy might have. "Grow!" she ordered it, flinging it at the reptile.

  The seed sprouted in midair. It developed into a broad net whose material glinted in the light like steel. This was no ordinary plant!

  The net settled neatly over the dragon and dug its fringe roots into the ground on all sides. Irene had never seen a plant like this before; evidently there were some excellent seeds in the batch from the Tree of Seeds!

  The dragon whomped forward, trying to brush the annoying net out of the way--and was thrown back by it. No strands broke. This was one plant the monster could not overpower by brute force.

  Furious, the dragon reached out with a leg or two and clawed at the net. Still it didn't give. The dragon blasted out white-hot steam--but the net did not wilt or melt. The dragon chomped on the dragnet with its teeth, but the vines held.

  "I think we've got it," Grundy said.

  "Well, talk to it!" Irene snapped. This had been entirely too near a thing.

  Grundy tried. He made a small roaring noise, which the dragon ignored. They would have to wait for the monster to settle down.

  They waited, glad for the chance to rest, and slowly the dragon's efforts abated. Soon it would listen to Grundy.

  "Odd," the golem remarked innocently. "I didn't hear you thank me for locating the key seed, the dragnet."

  Irene stifled further ire at his prodding. "Thank you so deliciously much!" she snapped. But of course Grundy's part in this had been essential; she did have to give credit where it was due, even to the most obnoxious person.

  "I do so appreciate your gracious--" Grundy began, then paused, listening.

  Zzapp!

  Chem stiffened. "What was that?"

  "What was what, silly filly?" Grundy asked, though obviously he had heard it, too.

  "Probably my imagination," the centaur decided. "For an instant I thought--a historical phenomenon my father Chester told me about--"

  "Who cares about history?" Grundy demanded. "We have a dragon to tame!"

  "I'm not sure," the Gorgon said. "My memory remains vague in certain areas, but I remember Humfrey once describing a really bad threat--"

  Zzapp!

  Now the dragon froze, its ears perking up. "Say--that dragon has two ears!" Grundy exclaimed. "So it does!" Chem agreed. "That can't be the Gap Dragon!

  Smash the Ogre smashed off one of its ears; we used that ear to tune in on danger--"

  "There are two Gap Dragons?" Irene asked, perplexed. "I'll ask," the golem said. He made another small, steamy roar.

  Now the dragon roared back.

  Astonished, Grundy translated. "She's not our dragon."

  "She?" Irene asked.

  Grundy exchanged more roars. "She's the female of the species. She comes every so often to mate with the Gap Dragon, using a secret entrance to the Gap he doesn't know about."

  "So she supposes!" Chem put in. "Once the forget-spell started breaking up, he remembered that exit, and the trouble started."

  "This time, when she arrived, he was gone. So she set out in search for him. She can wind him from afar--but he's elusive."

  "No wonder!" Chem said. "He's rejuvenated! Tell her that."

  "No cure for th
e Fountain of Youth, then..." the Gorgon said sadly. "If this had been the restored Gap Dragon--"

  Grundy told the lady Gap Dragon. She reacted with reptilian horror. Balls of steam drifted from her ears. "She wants to know how we expect her to mate with a baby," Grundy remarked with a smirk.

  "I wish I knew!" the Gorgon said.

  Zzapp!

  Again the dragon reacted. Grundy inquired--and his little face sagged with horror. "She's heard that sound before! She says it's a wiggle!"

  "A wiggle!" Chem said. "My dread has been realized. The worst possible threat to Xanth!"

  "Yes, now I remember," the Gorgon agreed. "This is terrible!"

  Irene was perplexed. "I think I've heard the term, but I don't really know anything about it. What's so bad about a wiggle?"

  Zzapp!

  Chem spotted two chunks of wood in the brush on the slope, picked them up, and stalked the sound while she talked. "The wiggles are tiny spiral worms that swarm periodically. Sometimes a century passes without an infestation; sometimes only a few decades. The last swarming was just about thirty years ago; my great uncle Herman the Hermit supervised the effort of containment, and lost his life in the process. It was hoped that the wiggle scourge had been permanently eradicated, but it seems not. Now we shall have to do the job over--and immediately."

  "But all I heard was a little zap!" Irene said. "What's wrong with that?"

  "That was the sound of the wiggle moving," the centaur explained. "It hovers in place for perhaps a minute--it's variable, or perhaps each individual worm has its own typical frequency--then zips forward in a straight line, a variable distance, but not far at a time. It--"

  Zzapp!

  "Oops--it's the dragnet," Chem said. "Grundy, quickly--explain to the female Gap Dragon--"

  But the dragoness had been paying close attention to the zaps. She had evidently been around for the last wiggle swarming, or perhaps the one before that, and knew how to deal with wiggles. She pounced on the tiny worm that appeared near her, crunching it in her teeth. Then she spat out the remains, making a lugubrious face.

  "They taste terrible, I understand," Chem explained.

  "But they can be crushed to death--if caught at the right moment." She grimaced. "Grundy, see if we can work things out with the dragoness. I fear we have a problem that's bigger than any of us."

  The golem started talking to the netted creature, who listened attentively.

  "So the wiggles travel in zippy lines," Irene said, irritated by her evident ignorance of something important. "What's wrong with that? Why kill an innocent flying worm that's just minding it's own business?"

  "It's the way they travel," Chem explained. "They go through things, they leave holes. When they go through air, a vacuum is left behind; the 'zzapp' is the sound of that tunnel of vacuum collapsing. When they go through trees, the wood is punctured. When a person is in the way--"

  "I begin to understand," Irene said, shuddering. "And there's no way to stop them?"

  "Only by killing them," Chem said. "Their bodies are tough, yet can be crushed. I was going to squish this one between the pieces of wood, but the lady Gap Dragon chewed it instead. It's also good to put a wiggle between a rock and a hard place. However this was only one. Wiggles never travel singly; they're always part of a swarm of thousands, radiating out from a central nest. We must find and destroy that nest and must eradicate every individual wiggle who has already departed from it, because any one of them can get to where it's going, hibernate for decades, then form a new nest and swarm again. No one knows precisely what a wiggle is doing between swarms, but the life pattern of its species seems to resemble its individual one--mostly stasis, punctuated by sudden, calamitous movement. If too many wiggles escape, the next swarming could consist of many nests in different locations--"

  "And all those zapping worms, punching through plants and animals and people, could threaten much of the rest of life in Xanth," Irene concluded. "Now at last I have caught up with you! We must organize a campaign for extermination!"

  "We must indeed," Chem agreed. "I'm afraid this pre-empts our search for Ivy and Hugo, for now all of Xanth is threatened."

  "Ivy and Hugo!" Irene exclaimed, stricken. "My vision--the terrible, unseen threat--this is it!"

  The Gorgon was equally horrified. "If they are headed toward the swarm, not knowing--"

  "Yet we cannot ignore the swarm itself," Chem insisted. "If we pursue the children now, the wiggles could overrun Xanth and be entirely out of control. The greater good requires--"

  "Don't try to use reason on a worried mother," Grundy said.

  "I'll do both," Irene said resolutely. "I won't let either Xanth or my child be doomed! But how can we best fight the wiggle menace?"

  "All the creatures of the region must be summoned to help," Chem said. "Each must stomp or chew or otherwise crush or dispose of one wiggle at a time. It's a tedious and dangerous chore, for anyone near a wiggle swarm is apt to get holed, but there is no other way. And it must be done rapidly, because more wiggles must be pouring out of that nest every moment, and they don't wait for anything except their own mysterious imperative. How anyone can reach the nest without getting hopelessly holed is problematical, but it must be attempted."

  "The female dragon understands," Grundy announced. "She's been around a long time. She's seen wiggles before. She'll help fight them."

  "Will she stop chasing us if we free her?" the Gorgon asked.

  The golem growled at the dragoness.

  "How did they eradicate the last nest?" Irene asked in the interim.

  "I believe they got a salamander to start a magic fire," the centaur said. "The fire burned inward in a constricting circle, destroying them all. But our chance of finding a salamander in time to do the job is not good; they're very rare and private creatures."

  "I can grow a flame-vine--" Irene said.

  "No, only magic fire will do it, as I understand it," the centaur said. "Ordinary fire might get a few, but could also burn out of control. Salamander fire burns anything and everything, which regular fire doesn't, but it is also one-way, so it is self-limiting. Both qualities are essential; otherwise we would do more harm than good."

  "The dragoness says she'll spare us," Grundy reported. "She was after us only because she was hungry. She's been so busy searching for her mate, she forgot to eat--"

  "I understand perfectly," the Gorgon said. "Tell her we'll help her find her mate, if she helps us now. But tell her also about the youthening--"

  "Her mate is with my child," Irene said. "Our missions coincide."

  "She agrees. But she's very hungry."

  That was a problem. It was not safe for anyone to keep company with a hungry dragon! "I can grow beefsteak tomatoes for her," Irene offered. She fished out a seed. "Grow."

  The plant burst into growth and soon fruited. The dragoness grabbed the beefsteaks as the Gorgon plucked them and tossed them to her.

  Irene found an acid seed and planted it near the rooted edge of the dragonet. The acid ate into the net, dissolving the strands, and soon the lady Gap Dragon was able to crawl out.

  Zzapp!

  "Let me go after this one!" the Gorgon said. She followed the sound, located the worm, and put her face close to it. Then she lifted her veil, while the others averted their eyes. Grundy warned the dragoness, who also looked away.

  The worm fell like a little stone. "It worked!" the Gorgon cried, dropping her veil back into place. "I can stone them!"

  "Just watch you don't try it when one's about to zap!" Grundy warned. "You'd get holed through your face."

  "I'll be careful," the Gorgon promised.

  "Very well," Irene said. "Let's start organizing this. As I see it, we have three things to do. We have to fight the wiggles here, rescue the children--all three of them--and alert the rest of Xanth to the crisis. I think we can do all three at once, by splitting up our party. Gorgon, why don't you and the lady Gap Dragon work together here, stoning wiggles? She can carr
y you rapidly to and away from them, so you'll have the situation under control, and you can stone all the wiggles you meet. You can work better without the rest of us, because--"

  "I understand," the Gorgon said. "I don't want a crowd of people around when I lift my veil!"

  "But what about the dragoness' quest for the real Gap Dragon?" Chem asked.

  "If she helps fight the wiggles here, that will free the rest of us to continue our search for the children, picking up their trail at the Cyclops' cave," Irene explained. "If we find the little dragon with Ivy and Hugo, as it seems we should, Grundy can tell him where to find the female dragon--so that will be all right." She nodded to herself. "You know, it becomes more plain why Humfrey said to preserve the Gap Dragon. There are interactions out here in the wilderness that we know little of, but that can relate intimately to the welfare of all Xanth."

  "The total ecology," Chem agreed. "We ignore it at our peril. Everything relates."

  Grundy explained to the dragoness, who nodded. She well understood the need and recognized that Irene's party could do a better job of tracking down the children more quickly than she herself could. Now that the edge had been taken off her hunger, she was a reasonable creature. Soon she and the Gorgon moved off, the dragoness' keen ears perked for more zaps. Dragons' ears were very special; she would locate more wiggles more rapidly than the others could.

  "Now for the reinforcements," Irene said. "Grundy--we need you for translations, but now I think we need even more to get the word out about the wiggles. If we encounter the rejuvenated Gap Dragon before you rejoin us, we'll try to communicate with him somehow. Maybe Ivy has found a way. I'll grow an airplane plant you can ride to Parnassus, so you can tell the Simurgh. I'm sure the big bird will take it from there. Then you can return to us--"

  "The Simurgh doesn't permit others to fly over Parnassus!" Grundy protested.

  "It's a risk you'll have to take. Try to give your message the moment she sees you; then it should be all right. She's a pretty smart bird, and remember, she can read your mind. So you can think loudly as you approach: WIGGLE! WIGGLE!"