Query re CoS: Platform 9&3/4, magic, and Dobby

[lake4fam at earthlink.net]

No: HPFGUIDX 27352

  IIRC, in PoA we are told that house elves cannot do magic, because 
they are not allowed wands.  Winky is accused of conjuring the Dark 
Mark, and the accusation seemed to be upheld because they found her 
with Harry's pilfered wand.  
   How, then, did Dobby manage to seal off the entry to Platform 9 & 
3/4?  He certainly would not have been acting with Malfoy's per-
mission, and would have had to take one of the family's wands.  
   And to what horrible punishment would he have to subject himself?
   If this has been discussed before, would one of the loyal cadre be 
so kind as to direct me to the proper messages?  And if not, would 
Luke or Rowena be so kind as to enlighten me?

Thank you.

dittany/custodienne - who got struck by a thought while cleaning the 
boys' bathroom & listening to CoS