From Philosopher's Stone: "There weren't many people left now. 'Moon'... 'Nott'... 'Parkinson'... then a pair of twin girls, 'Patil' and 'Patil'... then 'Perks, Sally-Anne'... and finally... 'Potter, Harry!'"
From Order of the Phoenix: "Ten minutes later, Professor Flitwick called: 'Parkinson, Pansy - Patil, Padma - Patil, Parvati - Potter, Harry.'"
WHAT HAPPENED TO SALLY-ANNE PERKS?
She started Hogwarts the same year as Harry, Ron and Hermione.
She was on the class roll, just before Harry, and was often put into a group with him for class work. However, she disappeared after the first couple of years. This was to become a mystery. Until now...
Be prepared for the explanation as to what happened to Sally-Anne Perks.