Sneakoscope question

[ladyramkin2000]

No: HPFGUIDX 95805

Many thanks, Steve, for coming up with a (I think) water-tight 
explanation of why the sneakoscope went off when it did.  I was 
puzzled by the fact that both Scabbers and Lupin had been in the 
carriage all along, without setting off the mechanism, but if 
Scabbers had heard Lupin's name, it would naturally set him off into 
panic-mode, thereby activating the Sneakoscope, which had remained 
dormant while he was.
Incidentally, I'm convinced Lupin was awake all the time.  
Eavesdroppping is too harsh a word.  He was doing what DD had 
presumably told him to do i.e. keeping an eye (albeit metaphorically) 
on the kids, knowing that the Dementors would be arriving.  Why else 
was he travelling on the train.  None of the other teachers do.

Sylvia (who can now go on worrying about something else)