That, at least, Childermass can answer, over whether or not they're expected to bring supplies. Blue, Blue, that isn't how hosting a party works, but at this point, he'll need to assume gems don't have parties just like they don't eat food. So, he gives his head another shake.

"That much you won't have to worry about," he assures her. "When you invite people into your home it is expected you provide for your guests. You house them and you feed them as reasonably as you are able to, which, as I said, should include silverware."