'Just jump aboard the nearest loop and stay there,' Chester advised. 'You'll understand it once you do it.'
'You have more confidence in me than I do,' Bink said dubiously. 'I hope you know what I'm doing.'
'I trusted you to get us out of the nickelpede crevice Crombie got us into,' Chester said. 'Now you trust me to get you across that moat. It isn't as if you've never ridden a monster before.'
'Squawk!' Crombie cried, pointing a wing at the centaur. Bink smiled; he had been riding the centaur. Score one for the soldier.
'Just don't fall off,' Chester continued evenly. 'You'd get crushed by the coils.'
'Um,' Bink agreed, sobering. Even with his talent backing him up, he didn't like this. Walking the back of a moving sea monster? Why not walk the wings of a flying roc, while he was at it!
He cast his gaze about, as he tended to do when he sought some escape from what he knew he could not escape-and spotted another mound of earth. Angrily he marched a few paces and stepped on it, pressing it down.
But when a convenient loop offered, Bink jumped across to it, windmilling his arms in the fashion of a mill-tree to regain his balance. The segment of monster sank somewhat beneath his weight, then stabilized pneumatically. Though glistening with moisture, the white skin was not slippery. Good; maybe this walk was possible after all!
The flesh rippled. The section in front of him subsided into the water. 'Turn about!' Chester called from the bank. 'Stay with it!'
Bink turned, windmilling again. There, behind/before him, the loop was extending. He stepped along it, hurrying as the water lapped at his heels. This was like a magic highway, opening out ahead of him, closing behind him. Maybe that was the basic principle of such one-way paths; they were really the backs of monsters! Yet though the serpent seemed to be moving toward Bink's rear, the loop stayed in place, or drifted slightly forward. So he was walking fairly swiftly, to make rather slow progress. 'I'll never get across this way,' he complained. 'I'm not even walking toward the castle.'
'You'll get there,' Chester called. 'Keep your feet going.'
Bink kept walking, and the centaur and griffin moved slowly around the moat to keep pace. Suddenly a loop developed between him and his friends. 'Hey, I've crossed to an inner loop-and I never left this one!' Bink exclaimed.
'You are spiraling inward,' Chester explained. 'There is no other way to go. When you get to the inner bank, jump off.'
Bink continued, rather enjoying it now that he had his sea legs and understood the mechanism. There was no way he could avoid reaching the other shore, so long as he kept his place here. Yet what an ingenious puzzle it was; could he have solved it without Chester's help?
Abruptly the segment narrowed. He was coming to the end of the tail! Then the head of the ouroboros came in sight, its teeth firmly clamped to the tail. Suddenly nervous again, Bink had no alternative but to tread on that head. Suppose it decided to let go the tail, just this once, and take him in instead? The big dragon eyes stared briefly at him, sending a chill through his body.
Then the head was past, continuing its undulation into the water, and Bink was treading the massive neck, broad as a highway after the slender tail. Apparently this dragon, serpent, or whatever was independent of air; it could keep its head submerged indefinitely. Yet how did it eat, if it never let go of its tail? It couldn't be eating itself, could it? Maybe that had been its Question for the Magician: how could it let go of its tail, so it could consume the idiots who walked along its length? No, if it had the answer to that, it would have gobbled up Bink as he passed. 'Jump, Bink!' Chester called. Oops-had the serpent changed its mind, let go, and come to gobble? Bink looked back, but saw nothing special. Then he looked ahead-and discovered that the body was twisting down and under the adjacent leg of the spiral. No more highway! He leaped to shore as his footing ended.
Now he was at the outer rampart of the castle. He looked for the great doorway he had encountered on his first approach to this castle, back before Trent was King-and found a waterfall.
A waterfall? How had that gotten here? He traced It upward and saw a ledge; the water issued from somewhere out of sight, to course down over the frame of the door.
Was there an aperture behind the sheet of water? Bink did not relish getting wet here, after traversing the whole moat dry, but he would have to look. He removed his clothing and set it aside, so that it would not get soaked, then nudged cautiously into the waterfall.
The water was cool but not chill. There was a small air space behind it. Then the wood facing of the door. He explored the surface with his hands, pushing here and there, but found no looseness anywhere. There was no entrance here.
He backed out of the fall, shaking his head to clear it of drips. Where could he go from here? The ledge circled the castle, but he knew the wall was solid stone throughout. There would be no access to the interior.
Nevertheless, Bink made the circuit, verifying his suspicion. No access. What now?
He suffered a surge of anger. Here he was on the King's business; why should he have to go through all this nonsense? The old gnome-Magician thought he was so clever, putting a maze around himself! Bink had just about had it with mazes. First the Queen's, then the nickelpede crevice, now this.
But at heart Bink was a practical man. In due course the pressure of his anger ceased, like the steam of a relaxing dragon. He came to look at the waterfall again. This was no mountain, with natural drainage. The water had to be raised by mundane or magical means to an upper level, then poured out. Surely it was a circulatory system, drawn from the moat and returning to it. Could he swim in where the water was sucked up?
No. Water could go where he could not. Such as through a sieve. He could drown, if his body got stuck in the water channel. Not worth the risk.
The only other direction was up. Could he climb?
