Ok this may be a dumd question (Snape/Lilly)

[Tandra]

No: HPFGUIDX 182568

Ok so we know that Snape's Patronus is a doe, which we find out in DH. 
But why does it seem to be common knowledge(to Harry, DD, and everyone 
on this board but me) that Lilly's was a doe as well? I do not remember 
this anywhere in the books. (now I am not claiming to know all from the 
books...lol) But if someone could please let me know so i can look for 
it and read it myself. (though I guess I could find it mysely during 
the reread I plan to do of the series again soon...but who has the 
patience for that? lol) Thanks to anyone that can help.


T :-)