Spinners End - who was there?

[Edis]

No: HPFGUIDX 140905

The Spinner's End scene is clearly a crucial one. But I have a 
subversive thought.

We have had Polyjuice Potion as a recurring theme and I sometimes 
wonder if Dumbledore has used it to insert himself into other's 
meetings to eavesdrop. Doing efficently what Harry does clumsily in 
CoS.

When I first read Spinner's End I wondered if Snape was in fact 
Dumbledore transfomed into Snape's form. Dumbledore was after all 
once Transfiguration Teacher at Hogwarts.

This would require Snape to produce good quality Polyjuice with his 
own hair in it for Dumbledore's use, and hide while Dumbledore 
assumed his identity. 

In this variation it is Dumbledore in Snapes bodily form who takes 
the unbreakable vow. 

Now this obviously complicates the operation of the vow -it 
introduces paradoxes. When I read about Dumbledore's blasted wand 
hand in the next chapter I wondered if this was as the result of 
trying to get round the consequences of the paradoxical vow. 

I got swept on with the story as usually understood but I do wonder 
about my first thoughts... If Snape never took the vow but Dumbledore 
was under complex restraints from the consequences of his undercover 
operations.

Edis