S

“Father . . . ," Gabriel began. "Father is a worm."
Will gave a short laugh. He was in gear as if he had just come from the practice room, and his hair curled damply against his temples. He was not looking at Tessa, but she had grown used to that. Will hardly ever looked at her unless he had to. "It's good to see you've come round to our view of things, Gabriel, but this is an unusual way of announcing it."
Gideon shot Will a reproachful look before turning back to his brother. "What do you mean, Gabriel? What did Father do?"
Gabriel shook his head. "He's a worm," he said again, tonelessly.
"I know. He has brought shame on the name of Lightwood, and lied to both of us. He shamed and destroyed our mother. But we need not be like him."
Gabriel pulled away from his brother's grip, his teeth suddenly flashing in an angry scowl. "You're not listening to me," he said. "He's a worm. A worm. A bloody great serpentlike thing. Since Mortmain stopped sending the medicine, he's been getting worse. Changing. Those sores upon his arms, they started to cover him. His hands, his neck, h-his face . . ." Gabriel's green eyes sought Will. "It was the pox, wasn't it? You know all about it, don't you? Aren't you some sort of expert?"
"Well, you needn't act as if I invented it," said Will. "Just because I believed it existed. There are accounts of it—old stories in the library—”
― Cassandra Clare, The Infernal Devices: Clockwork Princess