Beats him, he hasn’t thought of one right now. The knocking behind the walls keeps on persisting and it could last for who knows how long. However, Harry does have a simple tracking solution at hand.

“Hey Aurora, maybe I can move the furniture around to find whatever holes they may have made on the walls and you can ask your animal friends to find the ones where the brownies are hiding at,” he proposes the plan to Aurora, it might be simple, but they have to start from somewhere to catch those pesky brownies.