Patronus uses?

Sat Dec 17 23:16:58 UTC 2005

No: HPFGUIDX 144910

Apparently the patronus charm has uses other than just scaring off dementors, since 
Tonks uses it to summon someone to let Harry in to the castle in HBP. It seemed an 
odd choice to me. I guess it was a device to let us know that Tonks' problems were 
deep seated and even affected the form of her patronus, but do you suppose that 
there are even other uses? 

kchuplis