    Harry paused to gather his thoughts and check that they were still very much alone. Most of the Slytherins – and indeed, the rest of the school – had elected to stay in their common room in the evenings after class, so the three first years basically had the entire library to themselves. There were a few study cubicles in use, but there were silencing charms erected around them anyway. The people inside them could hear nothing, so the three Slytherins were safe to talk. 