"I agree, Mat, it is not an ideal situation. But I have been topside for some while now, in contact with Nebul, the embassy, and wandering all the streets between. As far as I can determine, not attempting this action is tantamount to turning yourself in." I pause to let that sink in. Mat looks a little worried but I can tell he's never going to go for it without some major convincing. But just looking at him isn't giving me the information I need to manipulate him. I just don't know him well enough to gauge his motives. I decide, in ages old Dwarven fashion, to go for the direct approach instead. "Here's the thing, Mat. I don't know you. I know some of them," I jerk a thumb back at the boys, "and some of them know me but you are new to this situation. We appreciate your help in keeping these boys safe from harm and I can personally assure you that you will be handsomely compensated for your troubles."
I turn to look at Eadmund. "You know the Dwarves, Eadmund. Thorin will be leading us." I can see realization dawn in the young squire's eyes. Thorin is renowned for his unfailing toughness and his undying loyalty. He's gruff and hard to get along with but if anyone can make sure we survive down there, it's that grizzled old bastard. And his delvers take after their leader. The boy begins to nod. The other boys still look scared and confused but they do take note of their compatriot's nearly instantaneous change of mood.
"Now," I say turning back to Mat, "you can either take your chances with us or you can rot in the King's dungeons. Either way, these boys are under my protection and not yours."