Prompt: autumn
Word Count: 100
Severus returned by night, a small glowing plant carefully cradled in his hands. He slipped in through a salley port, then went straight to his rooms without speaking a word to anyone. The Slytherin prefects did the bed check and slipped the roster under his door, for his door was locked and they knew better than to knock.
The next morning he appeared early for breakfast, said nothing to anyone,and slipped out before Septima Vector arrived. He taught his classes with a minimum of words, nodded to his colleagues but did not speak, and retired early.
What was going on?