I'm just afraid that we might not know what good can be done. We'll have to be careful here. Anything can spark more trouble, especially if one or another side turns out to be very, very responsible for the loss of sun.

[And given that the goblins were already said to have assassinated the queen, he really hopes that they aren't behind this. Harry doesn't like goblins terribly much. His knowledge of them is something that makes him look upon them unkindly, but that's because they had screwed him over before. He doesn't want that to happen again.]

The question is, we might end up getting ourselves in trouble for keeping that information away from them. But we can't risk it. That is, if we can find out at all. We might not be able to.