He takes a sip of his tea as Childermass talks, but that can't hide the small grimace on Strange's face as Childermass mentions one of the banes of his existence: the English class system. Because he's right! Though the two men are both magicians (and, in the privacy of his own thoughts, Strange will admit that he probably thinks Childermass the better magician), there will still be those in England who refuse to listen to a servant, even if that servant has been privy to the ins and outs of English magic.

Despite the nonchalant tone, Strange knows this is going to suck for Childermass. and that grimace acknowledges the fact that yeah, Strange knows this is going to suck. But the other man mentions one conversation thread that Strange can't help but latch onto.

"Perhaps you can tell me about the more important things?" Strange hopefully asks.

This is sheer nosiness on Strange's part. Childermass has always had an agenda, that much is obvious, but maybe now that he's brought magic to England then shunted out of the way due to the curse, Strange would be able to figure out more about what that agenda is.