'Where are we going?' Harry asked, as Dumbledore joined him at the front of the desk.
'This time,' said Dumbledore, 'we are going to enter my memory. I think you will find it both rich in detail and satisfyingly accurate. After you, Harry...'
Harry bent over the Pensieve; his face broke the coll surface of the memory and then he was falling through darkness again...
Seconds later his feet hit the firm ground, he opened his eyes and found that he and Dumbledore were standing in a bustling, old-fashioned London street.