    The other boy in their room was already asleep, his green curtains pulled around his bed so that Harry and Ron couldn’t disturb him. Sharing another look, the two boys shrugged and moved to their own beds. Erus slithered onto the bed, inspecting the length of it as Harry changed into his sleeping clothes and retrieved a mouse for Erus from his trunk. Satisfied that the mattress was, in fact, simply a mattress, Erus took the offered mouse and swallowed it whole.