Quirrell spent the 1991-1992 school year – Harry’s first at Hogwarts – working on an attempt to steal the Philosopher’s Stone, and thus bring Voldemort back to life. His first attempt to steal it, from Gringotts, was thwarted when Hagrid took it from the vault first (PS8) and it was after this that Voldemort decided to possess him (PS17). As Voldemort’s face was sticking out the back of his head, Quirrell had to wear a purple turban the entire school year to hide him (PS7).
- do HP Lexicon
Harry conheceu Quirrell em seu aniversário, antes do intervalo:
"...that Gringotts break-in happened on my birthday!"
Quirrell diz a Harry sobre seu fracasso em roubar a pedra, e isso isso foi quando Voldemort decidiu ficar mais atento:
"He does not forgive mistakes easily. When I failed to steal the stone from Gringotts, he was most displeased. He punished me... decided he would have to keep a closer watch on me...."