Here are some more clues from CoS that I have found...
**"You all know, of course, that Hogwarts was founded over a thousand years ago--the precise date is uncertain--by the four greatest witches and wizards of the age. The four school Houses are named after them: Godric Gryffindor, Helga Hufflepuff, Rowena Ravenclaw, and Salazar Slytherin. They built this castle together, far from prying Muggle eyes, for it was an age when magic was feared by common people, and witches and wizards suffered much persecution." [...]
"For a few years, the founders worked in harmon together, seeking out youngsters who showed signs of magic and bringing them to the castle to be educated. But then disagreements sprang up between them. A rift began to grow between Slytherin and the others. Slytherin wished to be more SELECTIVE about the students admitted to Hogwarts. he believed that magical learning should be kept within all-magic families. He disliked taking students of Muggle parentage, believing them to be untrustworthy. After a while, there was a serious argument on the subject between Slytherin and Gryffindor, and Slytherin left the school."**pg. 150--This simply tells us the legend of the founding of Hogwarts and the beginnings of the Chamber of Secrets. I think this will have something to do w/ book 6, but I don't know what/how. Also important to note is that Slytherin and Gryffindor were best friends
"For were there such friends anywhere
As Slytherin and Gryffindor?" OotP pg. 204
And the rift that had been made btwn the two friends was so huge that the spectrum of the relationship btwn the heirs of these two houses goes from best friends to mortal enemies (ie. Tom Riddle {Voldemort} and Harry Potter).
**Harry had never told Ron and Hermione that the Sorting Hat had seriously considered putting HIM in Slytherin. He could remember, as though it were yesterday, the small voice that had spoken in his ear when he'd placed the hat on his head a year before YOU COULD BE GREAT, YOU KNOW, IT'S ALL HERE IN YOUR HEAD, AND SLYTHERIN WOULD HELP YOU ON THE WAY TO GREATNESS, NO DOUBT ABOUT THAT....**pg. 153-154--If it's in two books it's gotta be important. And someone did say something about someone switching sides...Now I don't seriously think that Harry will become the Dark Lord incarnate...but it's just food for thought...
**"But I'm not Muggle-born--how can I be in danger from the Chamber?"**pg. 178--Harry talking to Dobby. I find that this question is never really answered...could it be answered in book 6? Was the Basilisk going after Muggle-borns as well as the heirs and/or the HBP which would somehow include Harry (not to mention Voldemort's eternal grudge w/ Harry--which is only more reason for him to want to kill Harry).
**"Harry Potter risks his own life for his friends!" moaned Dobby in a kind of miserable ecstasy. "So noble! So valiant! But he must save himself, he must, harry Potter must not--"** pg. 179--Noble and valiant? Theses are words usually reserved for royalty are they not? Now don't get me wrong, I know that JKR already said the HBP isn't Harry, but it is an interesting choice of words. She could have said "brave" b/c afterall that is the trademark trait of any Gryffindor...
**"The question is not WHO," said Dumbledore, his eyes on Colin. "The question is, HOW...."**pg. 181--This is the scene in the Hospital Wing when Dumbledore and McGonagall bring the petrified Colin Creevey in. Since we know what happens at the end of the book, that Tom Riddle (Voldemort) opens the Chamber, I think it is safe to say that Dumbledore knows that it is also Tom Riddle opening the Chamber for the second time. This also makes me think that he knows that Riddle is the Heir of Slytherin, and possibly that he knows the Heirs of all the houses...
**"I might tell you that you can trace my family back through nine generations of witches and warlocks and my blood's as pure as anyone's, so--"** pg. 200--Ernie Macmillan of Hufflepuff. I've read many people's suspicions that Ernie Macmillan could be the HBP but we now know that he is a pureblood and so can be crossed off the list of suspects.
**They rose upward in circles, higher and higher, until at last, slightly dizzy, Harry saw a gleaming oak door ahead, with a brass knocker in the shape of a griffin.
He knew now where he was being taken. This must be where Dumbledore lived.** pg. 204--Interesting that there is a brass knocker in the shape of a griffin on Dumbledore's door. Could this be b/c he is the heir of Gryffindor? I just remembered something great that happens later in the book....It dispells that theory, but is very interesting nonetheless....!!!!!!!!!
**"Yes...you were particularly difficult to place. But I stand by what I said before"--Harry's heart leapt--"you WOULD have done well in Slytherin--"** pg. 206--Going along w/ the whole Harry is the Heir of Gryffindor thing...why was he so difficult to place. Wouldn't he automatically have been put into Gryffindor? I decided to look back to the original Sorting Hat's Song...
"You might belong in Gryffindor,
Where dwell the brave at heart,
Their daring, nerve, and chivalry
Set Gryffindors apart; [...]
Or perhaps in Slytherin
You'll make your real friends,
Those cunning folk use any means
To achieve their ends." HP & the SS pg. 118--now the description of the ideal Slytherin sounds nothing like Harry, whereas the one for Gryffindor describes him perfectly. Now why would he have done well in Slytherin? Is it b/c Slytherin and Gryffindor were good friends in the beginning? I don't know...Let's look at the Sorting Hat's New Song...
Said Slytherin, "We'll teach just those
Whose ancestry is purest."
Said Ravenclaw, "We'll teach those whose
Intelligence is surest."
Said Gryffindor, "We'll teach all those
With brave deeds to their name,"
Said Hufflepuff, "I'll teach the lot,
And treat them just the same." HP & the OotP pg. 205--So why was Tom Riddle in Slytherin? He had a Muggle father. His ancestry isn't pure. And why then is Ernie Macmillan in Hufflepuff if he can trace his ancestry in the Wizarding World back up to 9 generations? And I remember someone asking Hermione why she wasn't in Ravenclaw, but I always forget the reason...Does the Sorting Hat ever make mistakes? I'm gonna go w/ a big fat no on that one...but it does make you wonder....
**...They can carry immensely heavy loads, their tears have healing powers, and they make highly FAITHFUL pets."** pg. 207--Again, does Dumbledore know that Harry's loyalty to him will call Fawkes? Ummm...probably, it is Dumbledore...And he probably does know that if there is trouble, Harry will be there to fight the good fight--afterall he does have that hero complex...
**...but it all came back to him as Dumbledore settled himself in the high chair behind the desk and fixed Harry with his penetrating, light-blue stare.** pg. 207-208--High chair? Kind of like a throne???
I'm sorry, this doesn't mean anything...but I think it is HILARIOUS that the Dursley's sent Harry a toothpick for Christmas!!! Why bother?!?!--pg. 212
**"You'd never know the Weasleys were purebloods, the way they behave."** pg. 222--I know we all know this, so moving on...
Back w/ more clues later...