Why is Harry safest at the Dursley's?
Here's some speculations about why Dumbledore placed Harry at the Dursleys'
|| I believe the speculation
about Mrs. Figg that lived a couple streets over from the Dursleys
being a witch is true. But I don't think an old witch alone explains
why Harry is safest there. I think that maybe the Fidelius Charm (like
the one that was performed on Lily and James' house in Godric's Hollow)
was performed on the Dursley's house. I suspect maybe Mrs. Figg is
the secret keeper, but that is a pretty thin speculation. We do know
that she is part of the "old crowd" of Dumbledore's from
the end on Book 4, and that implies those are people that Dumbledore
trusts completely and will trust with about anything, so maybe Mrs.
Figg being the secret keeper is not as thin as I thought. If it is
not the Fidelius Charm, then there must be some sort of magical protection
"Dumbledore invoked an ancient magic, to ensure the boy's
protection as long as he is in his relations' care. Not even I can
touch him there..."
Voldemort in Goblet of Fire
"Ancient magic" is also a term used to describe the protection
Lily bequeathed to Harry when she died.
This suggests that Petunia is more a part of the wizarding world than
she would care to admit.
That she (grudgingly) undertook the care of Harry despite what were
probably strenuous objectios from Vernon at Dumbledore's request indicates
that she knew him and
either respected or feared him enough to stand up on that issue..