Three years before the birth of Harry Potter, two policemen named PC Anderson and Sergeant Fisher chased two young boys on a motorbike. They caught the boys in a dead-end alley and asked for their names. The two boys first gave three random names: Wilberforce, Bathsheba, and Elvendork. But soon after, they identified themselves as James Potter and Sirius Black. The two policemen saw three men flying on broomsticks and were shocked to see the young boys using some sticks to lift up their police car to fend off the men.