"You see, we have never been able to keep a Defence Against the Dark Arts teacher for longer than a year since I refused the post to Voldemort."
-Albus Dumbledore to Harry Potter (HBP20)
"But to me, I'm afraid, you will always be Tom Riddle. It is one of the irritating things about old teachers. I am afraid that they never quite forget their charges' youthful beginnings."
-Albus Dumbledore to Tom Riddle (HBP20)
"The time is long gone when I could frighten you with a burning wardrobe and force you to make repayment for your crimes. But I wish I could, Tom.... I wish I could...."
-Albus Dumbledore to Tom Riddle (HBP20)
After getting the message about the lesson from Luna Harry arrives at his lesson with Dumbledore – having forgotten to do his homework and get the full memory from Slughorn. They watch two memories. In the first, Riddle visits Hepzibah Smith and sees what will become one of his horcruxes days before her death. In the second, Riddle asks Dumbledore for the D.A.D.A. post at Hogwarts, which Dumbledore admits began the curse on the position. Dumbledore warns Harry that further lessons will be useless without the memory from Slughorn. (HBP20)
Timeline Notes
The entire chapter takes place on the Monday following the previous chapter. Since that chapter ended on Saturday, 8 March, this one must be on Monday, 10 March.