Literature
Always... Book 1 Chapter 11
"Headmaster," Severus briefly bowed his head to the bespectacled man behind the desk. "I would like to discuss the matter of the upcoming Quidditch match."
"What about it?"
"Has a referee been chosen?"
Dumbledore looked up at the Potions Master, a tinkle in his eye. "Not as of yet. I assumed that Madame Hooch would be filling that role."
"Then, I wish to volunteer my services, sir."
His eyebrow shot up to join his long, silver hair. "And why is that?"
Snape took a deep breath, "I believe that Quirrell may try something else, and I believe that I would have better control of the situation should it arise were I on the field