New Harry Potter clues

TEEN HOLLYWOOD.COM - Hang out with the stars!: "Visitors to [J.K. Rowling's] website have to play a darts game and crack a code in order to read two lines from the sixth book Harry Potter and The Half Blood Prince - which will prelude the final book in the series.
The first revealed line reads, 'He looked rather like an old lion.'
The second lines reads, 'There were streaks of grey in his mane of tawny hair and his bushy eyebrows; he had keen yellowish eyes behind a pair of wire-rimmed spectacles and a certain rangy, loping grace even though he walked with a slight limp.'
The book's title refers to a 'half blood' which is a character like Potter's pal Hermione who has a non-wizard for a parent.
It is not known who is being described or from which section of the novel the extract was taken."