That fall Quentin’s studies changed again. There was less rote learning of gestures and arcane languages, though God knows there was plenty of that, and more actual spellcasting. They spent an entire month on low-level architectural magic: spells to strengthen foundations and rain-proof roofs and keep gutters free of rotting leaves, all of which they practiced on a pathetic little shed barely larger than a doghouse. Just one spell, to make a roof resistant to lightning, took Quentin three days to memorize, grinding the gestures in a mirror to get them exactly right, at the proper speed and with the proper angles and emphasis. And then there was the incantation, which was in a corrupt old Bedouin Arabic and very tricky. And then Professor March conjured a little rainstorm which emitted a single lightning bolt that sheared through it in one eye-searing, ego-demolishing instant, while Quentin stood there getting soaked to the skin.

On alternate Tuesdays Quentin worked with Bigby, the Physical Kids’ unofficial faculty advisor, who turned out be a small man with large liquid eyes and close-cropped gray hair who dressed neatly, if extremely affectedly, in a long Victorian-looking duster. His posture was slightly hunched, but he didn’t seem otherwise frail or crippled. Quentin had the impression that Bigby was a political refugee from somewhere. He was always making vague noises about the conspiracy that had ousted him, and what he would do following his inevitable return to power. He had the stiff, wounded dignity of the deposed intelligentsia.

One afternoon during a seminar—Bigby specialized in ridiculously difficult enchantments that transmuted elements by manipulating their structure on a quantum level—he paused and performed an odd gesture: he reached back behind first one shoulder, then the other, unbuttoning something back there. The movement reminded Quentin of nothing more than a woman unhooking her bra. When Bigby was finished four magnificent insect wings like a dragonfly’s, two on each side, sprang out from behind him. He flexed them with a deep, satisfied sigh.

The wings were gauzy and iridescent. They disappeared for a second in a buzz of activity, then reappeared as they became still.

“Sorry,” he said. “Couldn’t stand it a minute more.”

It never stopped, the weirdness of this place. It just went on and on.

“Professor Bigby, are you a—” Quentin stopped. A what? An elf? An angel? He was being rude, but he couldn’t help it. “Are you a fairy?”

Bigby smiled a pained smile. His wings made a dry chitinous rattle.

“Pixie, technically,” he said.

He seemed a little sensitive about it.