The water-path was finally headed for solid land again. Here the footing seemed to be especially intricate; the unicorn was almost doing a four-footed dance as she stepped along it. And here it was that a more formidable menace appeared.
From the deep water to the side emerged a huge and mottled reptilian head. It had two curling horns and greenish scales and widely spreading whiskers. Then the mouth opened, to reveal an array of teeth as formidable as any Mach had known of. Jets of steam issued from the metallic nostrils, forming swirling little clouds as they cooled and expanded.
The unicorn paused. It was evident that this was a threat she did not dismiss lightly. Indeed, as the monster lifted itself higher, Mach could see why. This was a literal dragon!
The dragon leaned forward, extending two front legs with ferocious talons. Its head swung on a sinuous neck. More steam issued, forming cloudlets bathing Mach with hot vapor. Viscous saliva dripped from the mouth.
The unicorn tilted her head so that her right eye bore directly on Mach, as if questioning him. He shrugged nervously. “If you don’t know what to do, I certainly don’t!” he said. He had been gaining confidence as the animal bore him to safety; now that confidence was rapidly draining away. He realized that the unicorn could not readily back away; the footing was so tricky that she probably had to move forward to achieve it. On land she could have fled the dragon; here she could not. Since it evidently had no fear of her horn, and appeared to be quite capable of destroying her in combat, this was a formidable threat.
The unicorn made something very like a shrug; the skin of her shoulders rippled. Then she faced the dragon and blew a new chord. This seemed to have about four notes, with a quaver and an especially penetrating quality; it made a shiver run down Mach’s back.
The dragon paused. Then it snorted more steam and cranked its jaws farther open. The gape of that mouth was horrendous; Mach realized that the dragon could snap off half his body with one bite, and perhaps intended to do just that. The unicorn’s chord of warning had not dissuaded it. This monster knew it commanded the situation, and it was hungry, and it intended to feed. Mach’s living heart was beating at a fast rate, and his living breathing was becoming noisy. He was afraid—if and this was an emotion he had never before experienced. He did not enjoy it.
The unicorn blew her chord again, louder. Again the dragon paused, the little ears below its horns swiveled to orient on that sound. Evidently the chord was a special type of signal, that did have some effect—but not enough to put this monster off entirely.
The dragon brought its head slowly down. The big nostrils pointed at Mach like the barrels of twin rifles. The torso expanded; evidently the dragon was taking deep breath, getting ready to issue a blast of steam that would cook man and unicorn in place.
The unicorn took her own deep breath. She set her self, pointed her horn straight up, and stretched out her neck. The hairs of her mane lifted, almost like the hackles of an angry dog. There was going to be one phenomenally loud sound!
Abruptly the dragon backed away. Its head traveled to the side and down to the water, and under the surface, and the sinuous neck and body followed. In a moment it was gone.
Mach relaxed quiveringly. The mare had bluffed the dragon away! For some reason the monster had feared the threatened loud sound more than the lesser sounds.
The unicorn resumed her motion along the path, picking her way toward the land. While she did this, Mach pondered the matter further. Surely the louder chord could not have hurt the dragon, if the fainter ones had not. Why, then, had it retreated?
His living brain was not as straightforward about logic as his robot brain had been, but this was not a difficult process. Obviously the chord was not a weapon in itself, but a signal—a call for help. Thus a faint one served as a warning, while a loud one would be heard all over the forest and bring reinforcements. Other unicorns, perhaps. One dragon might overcome one immobilized unicorn, but suppose several unicorns came? Yet the dragon had disappeared so swiftly and completely into the water that it was hard to see how other unicorns could have come in time to help, or how they could have located the dragon for revenge if they came too late to save their companion. So this didn’t make complete sense.
The unicorn reached land and picked up speed, resuming her trot. She resumed her melody; evidently she liked trotting to music. Where was she taking him? And why? She had put herself in real jeopardy to help him; why do this for a stranger? His logical mind struggled to make sense of things.