Here's where it all started: Harry's dream/vision in Divination class in the middle of
The Goblet of Fire.
Although I have always believed that these "visions" of Harry's, in which he was able to see what Voldemort was up to, were real, I realized that J.K. was about to give me absolute proof of the fact when I got to the end of the book.
When Harry's wand, you see, forces Voldemort's wand into
Priori Incantatem in their duel in the graveyard, the Dark Lord's wand "regurgitate[s] spells it has performed -- in reverse. The most recent first... and then those which preceded it". That's how Dumbledore explains the effect.
So I knew, if Harry's vision of Voldemort's using the
Cruciatus curse on Wormtail was actually true, we should see that spell emerge from Voldemort's wand in the graveyard.
And if the
Cruciatus curse did not emerge from the wand, then either Harry's visions were not real or... Rowling simply forgot to include the torture curse when she wrote the scene.
I was very pleased, then, when my test worked and confirmed that Harry's visions were real. The first curse to emerge from Voldemort's wand was described as "screams of pain", which would be the
Cruciatus Curse the Dark Lord had just used on Harry, then Wormtail's new hand, then "more shouts of pain" (Voldemort's torture of Wormtail to test his wand), then Cedric, and then more screams of pain (which would likely be the curse I was watching for: Voldemort's punishment of Wormtail that was depicted in Harry's Divination-Class vision).
Cool. So the visions were real. I already believed that they were but this confirmation was nice to have.
Unfortunately, I discovered several new problems through my careful examination of the
Priori Incantatem effect on Voldemort's wand.
First and most importantly, Voldemort's wand did not apparently cast the curse that killed Cedric Diggory. As you will recall, just after Harry and Cedric arrive in the graveyard, Wormtail approaches carrying a terrifying bundle. Before the two boys even understand what's happening, "a high, cold voice" says "
Kill the spare".
The cold, high voice is Voldemort, still barely alive, giving orders from inside the bundle. And then, "A swishing noise and a second voice, which screeched the words to the night: '
Avada Kedavra!'"
That second voice is Wormtail's -- he casts the spell that kills Cedric Diggory.
Perhaps Wormtail was using Voldemort's wand at that point, you suggest.
Perhaps. But there are three arguments against that:
First, Rowling makes no suggestion that Wormtail changes wands before he performs several other feats of magic soon after killing Cedric, including the
Lumos charm, the spell that creates the cords that bind Harry to the gravestone and the several bits of magic involved in preparing the cauldron for Voldemort. Yet none of those spells emerge from Voldemort's wand under the
Priori Incantatem effect.
Second, it is very clearly established in
The Deathly Hallows that Voldemort is protective of his own wand. He even mocks Lucius Malfoy when Lucius dares to believe that the Dark Lord might trade his own wand for Lucius', rather than simply taking it.
Third, and most compelling, when Voldemort recovers his full, adult body in the graveyard, Rowling indulges in a very careful, very detailed description of that recovery. She tells us that Wormtail gives the Dark Lord a robe from the bundle he had used to carry Voldemort into the graveyard. She describes Voldemort's careful examination of his recovered body in great detail.
And then... she says, "Voldemort slipped one of those unnaturally long-fingered hands into a deep pocket, and drew out a wand."
Until that point in time, the Dark Lord's wand had been hidden deep inside the bundle of robes.
So, I think we can agree, Voldemort's wand did
not kill Cedric Diggory. So Cedric should
not have emerged from the wand under the
Priori Incantatem effect. And Cedric
never should have been in a position to ask Harry to take his body back to his parents.
It was a lovely scene, no doubt, but it makes no sense at all in the context.
That's not all. There appears to be another inconsistency in the
Priori Incantatem scene.
I believe that it is well established that, when the Dark Lord came to Godric's Hollow to kill Harry in the very beginning of the entire tale, Voldemort first killed Harry's father and then offered Harry's mother the chance to live if she would simply step aside and allow Voldemort to kill the baby.
Lily Potter refuses and dies attempting to protect Harry. This selfless act provides Harry with the ancient magic that allows him to survive Voldemort's curse.
I honestly cannot recall where the passages are found in the seven books that confirm this version of the events but certainly the films present this version very clearly.
So why, if
Priori Incantatem effect causes a wand to "regurgitate spells it has performed -- in reverse. The most recent first... and then those which preceded it", does James Potter emerge from Voldemort's wand before Lily does?
Lily died last and, according to Dumbledore's explanation of the effect, should have emerged first. This is not so bit a problem as the whose-wand-killed-Cedric-Diggory conundrum above but it is still an error in the writing.