Meanwhile, guided by Albert’s subtle hints, Harry decided to take another look at Tom Riddle’s diary. Although Ron thought it was a complete waste of time, Harry didn't care at all, racking his brains to recall certain crucial clues he might have missed.
To this end, Harry wasted an entire afternoon, even skipping his Defense Against the Dark Arts class, until he finally managed to catch that fleeting flash of inspiration in his mind.
It was a small fragment of memory that Albert had secretly implanted into Harry's brain. He still remembered last time seeming to... accidentally drop some ink onto the diary, and then... Harry quickly flipped through those blank pages, but there wasn't the slightest trace of ink on them.
Chapter 561