Considering the threat to Childermass's own point in time is gone along with Hurtfew, Norrell, and Strange all, discovering his agenda is going to be far easier than even the other magician may have suspected. It's something he's struggled with, the idea of sharing what he's found with either Mr. Norrell or Mr. Strange. In the end, though, he had meant to drag Vinculus back to Hurtfew, to them, and now he's left the unbearable drunkard with Mr. Segundus and the other magicians for the time being.

So when Strange hopefully asks, Childermass will lean closer, just what little he can from across a table even though it means putting his elbows up on the tabletop to do so.

"I found it," he says and, while it's somewhat uncharacteristic for him to let anything even remotely like excitement show, he can't help it. It's there. Just a bit of it. He won't grin, but he certainly looks like he wants to. "The Raven King's book. After years of searching, I finally found it, just before you vanished along with Hurtfew Abbey."

And that's likely not to be a coincidence, but what it means exactly isn't something he yet knows.