He's right. Childermass does have questions, too many of them all jumbling up at once for him to pick one out and ask immediately, so instead he pauses, turns, and stares — somewhat disbelievingly — at Strange. Well, killing the enchanter to break the enchantment made enough sense, actually, but that last part.

The worst part about the last part is he feels like he already knew this, but that's impossible, isn't it?

"You summoned John Uskglass," he repeats quietly, slowly turning away from the stove and leaving the water to boil, for now, still trying to wrap his head around that one. How? When? And most importantly— "Did it work? Did he answer your call?"