Whats going on at Spinners End

[Brent]

No: HPFGUIDX 133753

Wormtail says he was sent to assist Snape.  But what are they up too?  
LV seems to have Snape doing something besides spy on DD.  

Also Hagrid mentions that during the argument between DD and Snape 
that DD says something about "Snape makin' investigations in his 
house".  Hagrid adds in Slytherin.  But I'm wondering if DD meant his 
actual house on Spinners end.  What investigation could be going on 
there that DD would want to know about?  Wormtail may be the spy this 
time for LV to see Snape is on his side.

The introduction of Snape having a house and Wormtail being there 
makes me think Snape is up to something interesting there.  

Brent