Dobby's motives in C of S

[day782002]

No: HPFGUIDX 32648

I have been wondering why Dobby initially approaches Harry in the 
beginning of C of S. He has been intercepting his mail, then arrives 
at Privet Drive to tell him not to return to school. Why? At this 
stage Lucius has not given the diary to Ginny, so there is no 
suggestion that the chamber will be opened, therefore Harry is in no 
danger. If Lucius has been plotting to enable the diary to be used to 
reopen the chamber then why not get Draco to do it? If he has cooked 
an elaborate and somewhat unreliable scheme and been talking about it 
at home, then this would suggest that Dobby would be aware of the 
possible danger to Harry, but why should a dark wizard's house elf 
want to protect Harry Potter?

Any thoughts?

Liz xxx