Dobby and Kreacher Apparate Inside Hogwarts

[amont4ljtk]

No: HPFGUIDX 149401

I have never been in a chat group before, so bare with me.  I love to 
listen to the HP books and have them on tape and not book.  I was 
listening to book 6 (for the 4th time) and in Chapter 21 Ron said 
something like - I wish I could apparate like a house elf.  But this 
made me question the fact that you can not apparate in Hogwarts.  Are 
magical creatures allowed to apparate where witches and wizards 
cannot?  If anyone has an answer to this please respond.  I have looked 
in lots of cites and cannot find an answer.

montague