It took several deep nervous breathes before Harry found the courage to speak, "Sirius Black," he said clearly, stumbling slightly over his words. For a long time, nothing happened, and Harry felt the nervous energy in his chest begin to recede. Of course - he was being ridiculous. Sirius had said they’d keep the mirror on themselves late into the evening. They’d said nothing about keeping it on them all day. He tried one last time though, just incase, "Sirius Black," he waited, only for there to be no answer again, and the nervous feeling in his belly was replaced by disappointment. He had been just about to tuck the mirror away in his trunk again, and in fact had half of it wedged in between the wall of the trunk and his long neglected quidditch gear, when he heard a voice.