Question regarding Tom Riddle

[pippin_999]

No: HPFGUIDX 46478

Richelle.. wrote:
> Is  Hagrid's comment about "You Know Who" coming from 
>Slytherin really the  only "proof" that Riddle was in Slytherin?  
<snip> Surely there's other canon supporting that Tom 
> Riddle was in Slytherin?

There's Ron and Harry's conversation in SS/PS ch. 6:
*****
[Ron said] "I don't suppose Ravenclaw *would* be too bad, but 
imagine if they put me in Slytherin."

"That's the house Vol-, I mean, You-Know-Who was in?"

"Yeah," said Ron.
******
Of course we don't know the source of Ron's knowledge, but it 
does seem that everyone, not just Hagrid, knows Voldemort was 
in Slytherin. 

Pippin