I could definitely see it being that. I doubt Hermione would ask him to write the LP, but trying to save him by going back with time turner... maybe he tried to go back further than the turner would allow. There's got to be a limit on it or they wouldn't give it to a student, even to Harry.
I don't see what else it could have been other than the time-turner, but that seems like an awfully unsatisfactory way to resolve what is a major plot point in canon.
I don't think it was meant to be the equivalent of saving Buckbeak. I still think they'll need it for the Snape/Sirius confrontation. Maybe Harry helps one of them escape? Or maybe he saves Buckbeak, though I don't think he has as much motivation to do it in this universe.
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Date: 2011-05-30 09:23 pm (UTC)no subject
Date: 2011-05-30 09:52 pm (UTC)no subject
Date: 2011-05-31 04:55 pm (UTC)no subject
Date: 2011-05-31 11:08 pm (UTC)