Her jaw trembled as she expelled the last of her breath, and I became aware of the overwhelming silence. She inhaled again slowly, and her whole body poured itself into another scream, but still not an audible whisper escaped her delicate lips.

A chill tingled up my spine. Beyond the obvious strangeness of the spectacle, there was something more profoundly unsettling about the woman’s muted cries. An indefinable spasm of grief and dread shuddered through me. Was this the life that Jackaby led? Death and madness and despair behind every door?

“She gets this way, from time to time,” Mona explained to the detective in a voice just above a whisper. “Always has. She can’t control them. They’re like seizures . . . only not like any I’ve seen in any of my medical books. Back home, she would go weeks, sometimes months without any problems. It was supposed to be better here, but we’ve barely had the apartment for a week and now this . . . It’s the worst she’s had. Hasn’t stopped since yesterday.”

“Since yesterday?” Jackaby asked.

“Yes, early yesterday morning, and on all through the night.”

Mrs. Morrigan’s body sagged as the air left her lungs again. Her eyelids flickered open for an instant, and she looked to Jackaby. Her hand reached weakly toward him, and he held it gently, the most human gesture I’d yet seen from the man; then her eyes closed, and the miserable cycle of silent screaming resumed.

Jackaby leaned in very close and whispered something in the woman’s ear. Mona watched him with concern. Mrs. Morrigan opened her eyes again and gave the detective a somber nod. She resumed her muted cries, but her body relaxed slightly into the pillows. Jackaby laid her hand tenderly back on the bed and rose to his feet.

“Thank you,” he said aloud, and stepped out into the apartment’s main room. Mona followed, shutting the door quietly behind them.

The detective pushed his dark, unruly hair roughly backward and screwed the cap back onto his head.

“What did you say to her?” asked Mona.

Jackaby considered his response. “Nothing of consequence. Miss O’Connor, thank you for your time. I’m afraid I cannot help Mrs. Morrigan’s condition for the moment, but if it comes as any consolation, this episode will resolve itself by sometime tonight.”

“Tonight?” she said. “You seem so sure.”

Jackaby stepped into the hallway and turned back. I stood up and slipped out after him. “I feel quite confident, yes. Take good care of your patient, Miss O’Connor. Good day.”

We were at the stairwell before I heard her shut the door behind us. Charlie and I burst at once into questions. What had he said? What kind of seizures were those? How could he be so sure they would end tonight?