OoTP,chap 15,Snapes essay-" varieties of venom antidotes

[karen_lvssr]

No: HPFGUIDX 112426

I have been re-reading OoTP and noticed something I hadn't 
before.  In Chapter 15, Snape assigns the students an Essay on 
the various Varieties of Venom antidotes.  Which isn't unusual, 
then Mr. Weasley gets attacked by a snake in Chapter 21-The 
Eye of the Snake, and the snake venom is giving the healers fits 
because they can't find an antidote.  Is this something that is a 
coincedence, is JKR giving us hints about the upcoming snake 
bite, or does Snape know something?  I just thought I'd throw it 
out there to see what you all think.

Karen