Marauder's Map, A History; Wasn't Wormtail Worried?

[potioncat]

No: HPFGUIDX 113215

Angie:  
> 
> But if MWPP left the map to other students, it looks like Wormtail 
> would have worried about being caught because he wouldn't know the 
> map was in Filch's office.  Maybe he felt that he had no choice 
but 
> to risk it?
> 


Potioncat:
Filch confiscated it from the Marauders.  The twins wouldn't have 
told Percy about stealing itl  So it's likely Pettigrew never knew 
they had the map. Some readers think Lupin was looking for it when 
he "searched" for a Boggart in Filch's office.

Does anyone remember when Ron found out about the map?  Had Scabbers 
already fled?
Potioncat