Harry stepped outside again and edged around the cabin. He could hear yelping in the distance. That meant the Dementors were closing in on Sirius¡. He and Hermione would be running to him any moment¡.
A flash of blue-white light erupted from both wands; for a moment, Scabbers was frozen in midair, his small gray form twisting madly ¡ª Ron yelled ¡ª the rat fell and hit the floor. There was another blinding flash of light and then ¡ª
¡°Orange. Tell me, boy, does anything penetrate that thick skull of yours? Didn't you hear me say, quite clearly, that only one cat spleen was needed? Didn't I state plainly that a dash of leech juice would suffice? What do I have to do to make you understand, Longbottom?¡±
¡°There you are, Harry,¡± said a voice.