[There are a million answers to that question which would no doubt interest Sirius - and every one of them provided him with ammunition.]

Why, indeed. If you know me as you believe you do - if I am the person you think I am, I would have much to gain. After all, I would want both his return and hers.

And yet the least likely person is telling you not to attempt to change the course of history.

[Flatly:]

I does make one wonder, doesn't it?