“You see what you expect to see, Severus.”

“And what will you give me in return, Severus?’ ‘In – in return?’ Snape gaped at Dumbledore, and Harry expected him to protest, but after a long moment he said, ‘Anything...”

“You are determined to hate him [Snape], Harry,” said Lupin with a faint smile. “And I understand; with James as your father, with Sirius as your godfather, you have inherited an old prejudice. By all means tell Dumbledore what you have told Arthur and me, but do not expect him to share your view of the matter; do not even expect him to be surprised by what you tell him. It might have been on Dumbledore’s orders that Severus questioned Draco.”

“Hide them all, then. Keep her – them – safe. Please.'And what will you give me in return, Severus?'In – in return? Anything.”

“My word, Severus, that I shall never reveal the best of you?’ Dumbledore sighed, looking down into Snape’s ferocious, anguished face. ‘If you insist …”

“He can run faster than Severus Snape confronted with shampoo.”

“Yes, Severus does seem the type, doesn't he? So useful to have him swooping around like an overgrown bat.”