```
"Thud! Thud! Thud!"
Several heavy knocks sounded from outside the study.
"Young Master," the hoarse voice of the old servant rose from beyond the door: "Do you need coffee or tea? I thought I heard some noise from your room."
Doctor Duzem gestured to the two guests with his eyes.
Fei Rui quickly waved his little paws, and the Rat Immortal also shook his head slightly.
"Don't disturb me, Constantin!" Doctor Duzem rejected the old servant's offer with a rough voice: "I'm pondering an issue!"
While he spoke, his fingers moved slightly, and he picked the velvet rug from the floor and draped it over the dressing mirror. The dressing mirror, which seemed intent on letting out a few more cries, fell silent instantly once covered by the velvet rug.
"Very well, Young Master." Constantin's voice paused for a few seconds before responding slowly: "Rest early, your work can wait until tomorrow to be resolved..."