There are about a hundred scathing things Childermass could say about Jonathan Strange and his "potential". Thankfully, what he asks next is out of left field enough that it derails any rudeness for the moment. Instead, he'll settle on giving Strange yet another 'are you crazy' look (the answer is yes, but for good measure) before saying—

"Of course I have," which isn't what he actually meant to say, but now that he is? The rest spills out as if it should all be obvious. "Proper England, none of that southern nonsense like London."

Because suddenly London seems like a terrible place and even the name itself is said with such disdain, though he can't even recall visiting it. He pauses after saying all that, brow furrowing in confusion and his gaze darting away from the mage, off to a corner as he thinks. When did he... ever...?