Longbottoms' Secret Keeper

[esmith222002]

No: HPFGUIDX 107401

It seems that the assumption is that Harry's parents were in hiding 
because of the prophecy. If this is so, then surely the Longbottoms 
would have been in hiding also. DD states that it was Voldemort 
who 'marked' Harry, suggesting that up to this point it was not known 
which child had the 'power to vanquish the Dark Lord'. This poses a 
few questions:
1. If the Longbottoms were protected, how could the Lestranges have 
found them?
2. If they were not protected, this suggests that DD knew that 
Voldemort would choose Harry. Is this because there is something 
about the Potters that we don't know, that made it obvious it was 
their child that was important? Or is it that the complete prophecy 
(because we have clearly not heard the whole prophecy) makes it much 
clearer who the child is?

"esmith222002"