With Baker already off, well, Childermass is stuck following along at least until he can recall the overexcited ball of fuzz. He does give Lambert a judgemental look when he asks that, however, because of all the things not to get...

"You never bothered to pick a saddle up? Surely they have them. You can't be the only person who's thought to ride on one of those horses," he says, pushing the tent flap out of the way before it can flop back to smack him in the face or something equally undignified.