Laura

“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...”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“Look...at...me..." he whispered. The green eyes found the black, but after a second, something in the depths of the dark pair seemed to vanish, leaving them fixed, blank, and empty. The hand holding Harry thudded to the floor, and Snape moved no more.”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“Karkaroff intends to flee if the Mark burns."
"Does he?" said Dumbledore softly, as Fleur Delacour and Roger Davies came giggling in from the grounds. "And are you tempted to join him?"
"No," said Snape, his black eyes on Fleur's and Roger's retreating figures. "I am not such a coward."
"No," agreed Dumbledore. You are a braver man by far than Igot Karkaroff. You know, I sometimes think we Sort too soon..."
He walked away, leaving Snape looking stricken.”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“What happened down in the dungeons between you and Professor Quirrell is a complete secret, so, naturally the whole school knows.”
― J. K. Rowling, Harry Potter and the Sorcerer's Stone