“Demon pox, oh demon poxJust how is it acquired?One must go down to the bad part of townUntil one is very tired.Demon pox, oh demon pox, I had it all along—Not the pox, you foolish blocks,I mean this very song—For I was right, and you were wrong!""Will!" Charlotte shouted over the noise, "Have you LOST YOUR MIND? CEASE THAT INFERNAL RACKET! Jem—" Jem, rising to his feet, clapped his hands over Will's mouth. "Do you promise to be quiet?" he hissed into his friend's ear.Will nodded, blue eyes blazing. Tessa was staring at him in amazement; they all were. She had seen Will many things—amused, bitter, condescending, angry, pitying—but never giddy before.Jem let him go. "All right, then."Will slid to the floor, his back against the armchair, and threw up his arms. "A demon pox on all your houses!" he announced, and yawned."Oh, God, weeks of pox jokes," said Jem. "We're in for it now.”

“Demon pox, oh, demon pox, Just how is it acquired? One must go down to the bad part of town Until one is very tired.Demon pox, oh, demon pox I had it all along— No, not the pox, you foolish blocks, I mean this very song— For I was right, and you were wrong!”

“Astriola. That IS demon pox. You had evidence that demon pox existed and you didnt mention it to me! Et tu, Brute!' He rolled up the paper and hit Jem over the head with it.”

“Will: Have you ever seen what happens to someone with demon pox? First it lies dormant. One begins to turn yellow and green. Then the swelling sets in -Jem: THERE IS NO SUCH THING AS DEMON POX.”

“Demon pox. There's always demon pox.”

“Jem raised his hand, and his witchlight flared into life, frightening a group of blackbeetles. They scurried across the floor, causing Will to grimace. “Nice place to live, isn’t it? Let’s hope they left something behind other than filth. Forwarding addresses, a few severed limbs, a prostitute or two…” “Indeed. Perhaps, if we’re fortunate, we can still catch syphilis.” “Or demon pox,” Will suggested cheerfully, trying the door under the stairs. It swung open, unlocked as the front door had been. “There’s always demon pox.” “Demon pox does not exist.” “Oh ye of little faith,” said Will, disappearing into the darkness under the stairs.”