The Keeper of the Hall of Prophesies

[steven1965aaa]

No: HPFGUIDX 156044

In HBP Dumbledore tells Harry, in the broom closet, that the only 2 
people alive who know the full contents of the prophesy are in this 
spidery broom closet (not an exact quote, don't have the books with 
me).

In OOP, in the scene in Dumbledore's office at the end, Dumbledore 
tells Harry that the Keeper of the Hall of Prophesies inserted 
Harry's name (with a (?)) on the prophesy after Voldmort's attack on 
the Potter family, because that attack made it clear which boy 
Voldemort believed to be the one named in the prophesy.

It seems to me that for the Keeper to have come to that conclusion, 
and even for the Keeper to have known that there was a question 
about which boy was "the one with the power to vanquish the Dark 
Lord", the Keeper must have know about the contents of the prophesy.

I guess he could have known just about the first half, being told 
about it by Dumbledore, but his decision to put Harry's name on it 
after the attack ("mark him") would make a lot more sense if he knew 
the full contents.  

If the Keeper potentially knows the contents, why wouldn't Voldemort 
go after the Keeper?  Maybe Voldemort doesn't know.  Maybe the 
keeper who knew the contents of the prophesy is dead and the current 
Keeper doesn't know the contents, which would make Dubmledore's 
statement to Harry true.  Maybe as an unspeakable there would be 
something to magicallly prevent the Keeper from blabbing.  

Sorry I'm rambling.  Any thoughts?