[Diarmuid shakes a finger at the other boy, as stern an expression as he can manage on his face.]

Now you promised you would help that group! Knights don't break promises. You have to go with them, but we can explore more when you get back. I will go to a different area than you and we both will have lots to tell each other. What did my father call it... Scouting! We both are going on scouting missions! That way we can plan for when we go back!