Take a Thames nighttime cruise and believe Patronuses shimmering throughout the water, defending the town with silvery

https://www.scribd.com/document/997518056/Best-Time-to-Visit-Platform-9-and-the-Harry-Potter-Shop-at-King-s-Cross-142331

Take a Thames evening cruise and think of Patronuses shimmering throughout the water, protecting the city with silvery, defensive magic.