"I've seen this before," said Newt. "Those kind of marks can only be made by the Faceless Old Woman That Secretly Lives In Your Home."
"You can't be serious."
"Oh, I'm deadly serious. She's been an awful nuisance lately- getting into the Niffler's tree and removing everything that's blue, replacing all the cutlery in the trunk with detailed anatomically correct diagrams of Flobberworms... we really must have a serious talk about that some day..."