Who conjures the Prongs Patronus?

[GulPlum]

No: HPFGUIDX 53309

Norm wrote, in reply to my previous post:

>Actually, it still doesn't dispel my most basic question, which comes
>back to temporal displacement. Doesn't Harry1 *have* to cast a
>successful Patronus in order to be able to return later (as Harry2)?
>Irrespective of what Harry2 then does or doesn't do when he returns,
>if *something* hasn't otherwise saved Harry from the dementors, how
>can he come back from the future?

Errr... Harry1 was saved by Harry2's Patronus. Harry1 was about to be 
overcome by the Dementors who'd found a way through the "mist" he'd 
created, whereupon Prongs, conjured by Harry2, comes to the rescue.

There is no need for Harry1's Patronus to have any effect other than to 
delay the Dementors for long enough for Harry2 to realise what's going on.

--
GulPlum AKA Richard, who *thinks* he understands the question, but isn't 
quite sure...