“I don’t care:!”ve got to try. Are you coming? Because if not,I’m going by myself.”

“Oh… all right! But we’ll wish we’d stayed in here.” They stepped out of the cloakroom and cautiously opened the left-hand door.

The dull light prevented them from seeing much at first, hut they could make out the table and the reading-desk, and the black pillar in the centre of the floor.

“All clear!” whispered Susan.

They tiptoed into the room, closed the door, and stood quite still while their eyes grew accustomed to the light and then they saw.

The pillar was alive. It climbed from out the circle that Selina Place had so laboriously made, a column of oily smoke; and in the smoke strange shapes moved, Their forms were indistinct, but the children could see enough to wish themselves elsewhere.

Even as they watched the climax came. Faster and faster the pillar whirled, and thicker and thicker the dense fumes grew, and the floor began to tremble, and the children’s heads were of a sudden full of mournful voices that reached them out of a great and terrible distance. Flecks of shadow, buzzing like flies, danced out of the tapestries and were sucked into the reeking spiral. And then, without warning, the base of the column turned blue. The buzzing rose to a demented whine—and stopped. The whole swirling mass shuddered as though a brake had been savagely applied, lost momentum, died, and drooped like the ruin of a mighty tree. Silver lightnings ran upwards through the smoke: the column wavered, broke, and collapsed into the ball of fire that rose to engulf it. A voice whimpered close by the children and passed through the doorway behind them. The blue light waned, and in its place lay Firefrost, surrounded by the scattered remnants of Shape-shifter’s magic circle.

Colin and Susan stood transfixed. Then slowly, as if afraid that the stone would vanish if she breathed or took her eyes off it, Susan moved forward and picked it up.