They had just reached the quay, and the boats in the harbor had all just rolled upright, when a second mountain of water rolled over the harbor wall. Out of its smooth side burst a monster. It was a long, black, clawed thing, half cat, half sea lion, and it came racing down the wall toward the quay. Another burst out of the wave as it smashed into the harbor, long and low too, but scalier, and came racing after the first monster.

Everyone realized that the fight was not over yet and splashed backward hurriedly against the sheds and houses on the quayside. Sophie fell over a rope and then a doorstep. The arm came out of the horse and dragged her upright as the two monsters streaked past in a scatter of salt water. Another wave swirled over the harbor wall, and two more monsters burst out of that. They were identical to the first two, except the scaly one was closer to the catlike one. And the next rolling wave brought two more, closer together yet.

“What’s going on?” Sophie squawked as this third pair raced past, shaking the stones of the jetty as they ran.

“Illusions,” Michael’s voice said out of the horse. “Some of them. They’re both trying to fool one another into chasing the wrong one.”

“Which is who?” said Sophie.

“No idea,” said the horse.

Some of the onlookers found the monsters too terrifying. Many went home. Others jumped down into the rolling ships to fend them off from the quay. Sophie and Michael joined the hard core of watchers who set off through the streets of Porthaven after the monsters. First they followed a river of sea water, then huge, wet paw prints, and finally white gouges and scratches where the claws of the creatures had dug into the stones of the street. These led everyone out at the back of the town to the marshes where Sophie and Michael had chased the shooting star.

By this time all six creatures were bounding black dots, vanishing into the flat distance. The crowd spread out into a ragged line on the bank, staring, hoping for more, and afraid of what they might see. After a while no one could see anything but empty marsh. Nothing happened. Quite a few people were turning away to leave when of course everyone else shouted, “Look!” A ball of pale fire rolled lazily up in the distance. It must have been enormous. The bang that went with it only reached the watchers when the fireball had become a spreading tower of smoke. The line of people all winced at the blunt thunder of it. They watched the smoke spread until it became part of the mist on the marshes. They went on watching after that. But there was simply peace and silence. The wind rattled the marsh weeds, and birds began to dare to cry again.

“I reckon they must have done for one another,” people said. The crowd gradually split into separate figures hurrying away to jobs they had left half done.