A Small Dementor Puzzle

[linman6868 at aol.com]

No: HPFGUIDX 18975

Hello all --

A question occurred to me as I was thinking over some of the recent 
discussion of GoF, and I don't know if it's been addressed before, 
but here goes anyway...

Mad-Eye Moody says in the Pensieve that the proper treatment of 
Karkaroff would be to "hear his information and then throw him back 
to the dementors."  However, Voldemort later in GoF exults to his 
followers that he plans to call the dementors, "their natural 
allies," to his side once more.  Dumbledore confirms this by telling 
Fudge that Voldemort can give the dementors more scope for their 
pleasures than Fudge can.  I can't remember whether it's the giants 
Dumbledore says V. convinced to join him once before, or the 
dementors (and I don't have GoF still).

So the question is, when did Azkaban come under the jurisdiction of 
the dementors?  Was it continually so under VWI?  Did Voldemort fail 
to get the dementors on his side the first time?  If Azkaban was 
guarded by anything but dementors before, what were the guards?

Steve, is there something in your timeline that addresses this?

Lisa I., who loved Amy Z's clerihews!!!