Peeves flew down the hall past the Muggle studies office. He had a bottle of ink in his hand, and was looking for a student. Maybe he would pour it on their head!
He saw the Muggle studies nameplate and oh! an idea ran through Peeves' wittle brainy-brains...
He dipped his fingers in the ink and went to work.
SOOOO much better! He had to share it with someone. Peeves banged on the door and went invisible, giggling helplessly.
Oh, the professor would be SO SURPRISED!