Harry Potter and the Prisoner of Probability

"Mate, why'd you order a baby? And why'd it come by owl?" "I didn't, Ron!" - Harry can't let go. He just can't. He doesn't know how this happened, or why. He doesn't know how he'll manage it. But he knows what he has to do: Take care of her. Someone had put a baby in the post-like it was a newspaper or an advert-and sent it to him.