Arthur fell.

The air rushed past him, stinging his eyes and ripping at his hair and clothes. He had already fallen through the hole made by Saturday’s assault ram, past the grasping roots and tendrils of the underside of the Incomparable Gardens. Now he was plummeting through the clouds, and a small part of him knew that if he didn’t do something really soon he was going to smash into Saturday’s tower and in all likelihood be so badly broken that even with his newly reshaped Denizen body he would die — or wish he was dead.

But Arthur didn’t do anything, at least not in those first few, vital seconds. He knew it was an illusion, but it felt like the wind was holding him up, rather than rushing past. In his left hand he held the small mirror that was the Fifth Key, and in his right he clutched the quill pen that was the Sixth Key, which he had wrested from Saturday and taken with him over the edge. Because of this, Arthur felt powerful, triumphant, and not at all afraid.

He looked down at the tower below him and laughed — a deep, sarcastic laugh that was not at all like his normal laughter. He was about to laugh again when Part Six of the Will, in its raven form, caught up with him, its claws latching on to his hair and digging into his scalp.

“Wings!” croaked the raven urgently. It hung on to his head for a second, then lost its grip and spun off, calling out, “Fly! Fly!” as it tried desperately to keep up.

Instantly, Arthur lost his sense of euphoric invincibility and came back to his senses. He properly took in the speed of his descent for the first time and saw that he was going to hit the tower very, very soon.

This is all wrong, he thought. Where are my wings?!

He frantically searched his coat, even as he remembered that his grease monkey wings were still in the rain mantle that he’d exchanged for his current disguise as a Sorcerous Supernumerary — the disguise he’d used to infiltrate the assault ram . . . too successfully, perhaps, for he’d gone with the ram when it broke through into the Incomparable Gardens. While he had then gotten close enough to Superior Saturday to claim the Sixth Key, he’d fallen back through the hole in the ceiling of the Upper House.

Now he was falling a very, very long way down.

Even starting from such a height, Arthur had fallen far faster than he’d thought possible. He was going to miss the actual peak, he saw, and crash into the main part, some fifteen levels below.

No wings, thought Arthur. No wings!

His mind halted in panic, and all he could do was stare at the tower, tears streaming from his eyes because the wind was rushing by so fast. He found himself flapping his arms as if somehow that might help, and he was screaming, and then —

He crashed into a flying Internal Auditor, who screamed as well. Together they tumbled through the air, the Denizen’s wings thrashing wildly. Arthur tried to rip the wings from the Auditor, but he didn’t want to let go of the Fifth and Sixth Keys, so he couldn’t get a proper grip. He tried to transfer the Sixth Key so as to hold both Keys in his left hand, but in that vital moment, the Denizen kicked free and dove away, his wings folded back.

Arthur fell again, but the collision had checked his speed. He had a few seconds to take action, and his brain finally got back to work on problem-solving, instead of gloating over the Sixth Key or cowering in fear. He knew there was no way to avoid colliding with the tower — unless he never actually arrived there. . . .

A hundred feet from impact, Arthur somersaulted into a swan dive. Stretching his arms out below his body, he drew several steps in the air with the Sixth Key. The pen left glowing trails of light, which instantly took on the appearance of solid, white marble steps.

Arthur hit hard, immediately tucking himself into a ball to roll down the Improbable Stair. As he bounced and tumbled over each step, he knew he had to get his speed under control. Even when he stuck out his leg, he only tumbled sideways — and kept falling. Climbing up the Improbable Stair was bad enough, with the chance of coming out on some random Landing anywhere in time or space. Falling down it — completely out of control — was even worse.