Marauder's Map revisited

[maidne]

No: HPFGUIDX 58853

Hope this hasn't already been discussed to death -- when Fred and 
George give Harry the Marauder's Map they tell him "Don't bother with 
the one behind the mirror on the fourth floor.  We used it until last 
winter, but it's caved in -- completely blocked."  So does that 
tunnel connect to the Chamber of Secrets tunnel?  And if so, where 
else does it lead, because it seems pretty unlikely that F&G have 
ever been into the Chamber.

I also noticed that when Harry looks at the map for the first time he 
sees Dumbledore, Mrs. Norris, and Peeves.  Not himself, Fred, and 
George.  After Fred and George leave he looks at it again and sees 
that a figure labeled "Harry Potter" has *appeared* on it.  And that 
little figure isn't just standing there, doing what Harry is doing, 
it's actually showing him what to do next.  This seems to indicate 
that the map is selective in who it shows, which is probably why Fred 
and George never saw Peter Pettigrew on it, but Lupin did.  It also 
seems to indicate that when someone does show up on the map, the 
viewer should pay attention to who it is and what they're doing 
(Bartemious Crouch).

Anyone have anything to add or subtract?

Susan