Invisablity Cloaks

[Hagrid]

No: HPFGUIDX 154630

> "Tonks" wrote:
>
> In HBP Harry on the train is under the invisibility cloak. When 
Tonks 
> comes to his rescue she pulls the cloak off of him. How did she know 
> he was there?  The windows drawn would alert her, but how was she 
able 
> to find the cloak?  Can she see through them?
>

AUSSIE:
Harry used his invisibility cloak to leave the Dursleys with Tonks at 
the start of OOTP. If she was looking for Harry, groping around for 
the cloak's material wouldn't be too hard in the confines of a 
conpartment. Barty Couch Sr found his son under a cloak after he was 
stunned at the Quiddich World Cup. An "Accio" would reveal the person 
hiding underneath as well, I suppose, as long as you knew or suspected 
he was there.

But true, if the Maunderers Map can see through it, how vulnerable is 
Harry in Book 7 if he trusts it if he wanders down Knockturn Alley 
again. 

Snape, Wormtail and Draco know Harry has it. So it may begin to be a 
untrustworthy tool soon.