the Map

[Robert Jones]

No: HPFGUIDX 88785

We were reminded by geoff in message 88728 that Fred and George got 
the Map while in detention with Filch, grabbing it out of a drawer 
of confiscated stuff.

And this raises questions.  Why would they grab the Map since it was 
just a blank piece of paper rather than something that looked 
interesting?  ("Oooh, look at this drawer full of goodies!  I'll 
just grab this blank piece of parchment with no instructions.") And 
that leads to the basic question of how they learned to use it.  
Could they have learned from the person Filch confiscated it from?