The next day, Trevor was intercepted by Caleb and Caius, grabbed by the arms, and brought, shoving and pushing, into the dampest and most secluded of the abandoned classroom in the dungeons of Hogwarts. In there, Scorpius had set up everything they needed: parchment, quill, and inkwell were placed on a central bench, together with a small pewter cauldron that belonged to the youngest Slytherin and had been taken from him during class.