Well, there were *two* walls to listen to, since he's in the middle of three doors on this side of the hall, neither of which he's been into! The left wall is deathly quiet, so probably not much happening in there-but the right wall is thin enough he can make out someone muttering about 'stupid Inquisitors with their stupid demands, messing up my timetables...' So, someone in there, someone who knows things, but someone who's...aware and active. Very dangerous, very risky. Maybe the quiet room would be safer.