Plot to steal the Philosopher's Stone

"I knew you would be danger to me straight from the off, esspecially after Halloween...Snape unfortunately wasn't fooled, when everyone else was running about the dungeon, he went to the third floor to head me off. He, of course, never trusted me again. He rarely left me alone. But he doesn't understand, I'm never alone. Never. Now, what does this mirror do? I see what I desire. I see myself holding the Stone. But how do I get it?"

- Quirinus Quirrell

The took place during the Hogwarts 1991-1992 school year, in one of Voldemort's first attempts to gain power. It began with the 1991 Break-In of Gringotts Wizarding Bank and ended with the Battle in the Philosopher's Stone Chambers. After Quirinus Quirrell failed to rob the Stone, his master possessed him at Hogwarts. There they made many attempts to steal the Stone, until June 4, 1992, when Quirrell died.