[HPforGrownups] Re: Dumbledore and Malfoy conversation. Is that a clue?

[Alina]

No: HPFGUIDX 134270

> Of course he would know. Dumbledore clearly explained to Harry about
> the order of inheritance of house elves.  No way would Kreacher have
> referred to Sirius as his master if his older brother was still alive
> and absolutely no no no way would he have taken an order from Harry.  I
> really thought that bit was so clear as it was referring to this all
> being tied into magic, not just a 'knowledge' of someone being alive or
> dead.  And we all knwo how greta the magic of house elves is, even
> though they are not allowed to use it.
> 
> Wapp13

Regulus was younger than Sirius. From the American edition of OOTP,
Chapter Six, page 112:

"He was younger than me," said Sirius, "and a much better son, as I
was constantly reminded."

Alina.