They had to work fast, because the sunlight was fading. The sun had already gone dull and coppery, and in another few minutes its lower rim would touch the tops of the trees on the far side of the hayfield. The barest early-fall chill was in the air. Yellow lights were already on inside the house. Quentin heard—did he imagine it?—the pop of a cork being withdrawn from a bottle.

Holding both arms above her head and curved slightly upward, like she was balancing a large invisible basket on her head, Alice had created the magical equivalent of a magnifying glass a dozen yards across—her bent arms defined a small section of the total circumference of a soaring circular lens, the upper edge of which was even with the top of the beech tree, taller than the chimney of the little Victorian bungalow. Quentin could just make out the edge of the lens as a curved distortion in the air. The focal point was too bright to look at.

Alice stood about fifty feet back from the door. Quentin stood closer, to one side, holding out a hand to shield his eyes and shouting out directions:

“Up! Okay, slow! A little more! Keep moving! Okay, now right!”

Quentin could feel the heat from the focused sunlight against his face and smell the savory-sweet smell of wood smoke, along with an acrid tang of seared house paint. The door was definitely vulnerable to heat. They’d been worried that there wouldn’t be enough sunlight left, but Alice’s spell was cutting a nice deep charred trench in the wood. They’d decided to cut the door in half laterally, and if the trench wasn’t penetrating all the way through, it must be pretty close. A bigger problem was Alice’s aim, which wasn’t good, and in one place she had wandered off the door and burned a groove in the wall.

“I feel stupid!” Alice shouted. “How are we doing?”

“Looking good!”

“My back hurts! Are we almost done?”

“Almost!” he lied.

With a foot to go Alice expanded the spell’s radius to compensate for the fading sun. She was whispering, but he wasn’t sure if it was an incantation or just obscenities. Quentin realized they were being observed: one of the older professors, a very erect, white-haired man named Brzezinski, who specialized in potions and whose pants were always covered with appalling stains, had interrupted his evening stroll to watch them. In another lifetime he had given Quentin the test involving knots during his Examination. He wore sweater-vests and smoked a pipe and looked like an IBM engineer, circa 1950.

Shit, Quentin thought. They were about to get busted.

But Professor Brzezinski just took his pipe out of his mouth. “Carry on,” he said gruffly. He turned and walked back in the direction of the House.