[outside the witches' castle]
Septimus: [as he holds a sword to Tristan's throat] Who are you? What business do you have here?
Tristan: [he sees the number 7 mark on Septimus' hand] Septimus... I knew your brother, Primus.
Septimus: Unless you wish to meet him in the afterlife, I suggest you answer my question. What are you doing here?
Tristan: I might ask you the same thing!
[Septimus realises that Tristan is holding a butter knife to his gut]
Septimus: Ah...
[they both lower their weapons and peer through the window]
Septimus: There are four of them. Do as I say and we may stand a chance.
Tristan: Wait! How do I know you can be trusted?
Septimus: You don't. Why? Do you have a choice?
Tristan: No.
Septimus: Well then, let's go.