Dumbledore in CoS was Re: The Keeper of the Keys.

[Yonna]

No: HPFGUIDX 113466

SSSusan "cubfanbudwoman" <susiequsie23 at s...> wrote:
> Granted, he might still have had difficulty opening the 
> chamber [is the parseltongue required to open the SINK 
> entrance or the serpent DOOR down below?],

Yonna Here:
In CoS, Am. edition, soft back page 381. Harry is trying to open the 
CoS at the girls sink entrance and says," open up", Ron then looks 
at Harry and says, "English". Harry then wills himself to believe 
the snake on the faucet is really alive by moving his head and 
letting the candle light flicker. At this point Harry says,(quote 
from CoS book) "Open up" again, except this time words weren't what 
he heard; a strange hissing had escaped him, and at once the tap 
glowed with a brilliant white light and began to spin. Later in Cos, 
page 387, Harry is at the serpent entrance and...(Text from CoS) He 
could guess what he had to do. He cleared his throat, and the 
emerald eyes seemed to flicker. "Open" said Harry, in a low faint 
hiss. The serpents parted as the wall cracked open,...
So with this bit of information I would say yes. Parseltongue is 
required to open the Cos sink entrance and the serpent door below. 
If not, anyone could simply open the CoS and not the "only" the true 
heir to Slytherin.