Silence
December, 1986
Argus Filch wheezed down the hallway, following Mrs. Norris closely. "They can't have gone far, my sweet," he muttered to her before being nearly bowled over by a couple of fleeing students. Startled, he looked around for the source of the chaos and saw Irma Pince jinxing the students' things to hit them on the back of their head as they sprinted down the hallway.
"That will teach you to play Exploding Snap in my library!" she shouted after them.
"Students," grunted Filch as he passed Irma by.
"They have no respect," she replied, more to herself than to Argus.
"They track snow all over the castle…"
"Get chocolate all over my books…"
"Cause chaos when they're on holidays…"
"No regard whatsoever for the silent sanctuary that is a library…"
"Give me more trouble than Peeves…"
"Talking loudly…"
"Making messes…"
"All I ask for is silence."
"At least cats are clean animals."
They both sighed. "I hate the holidays," they said simultaneously.
Madam Pince looked over to regard Argus; Mr Filch glanced at Irma with narrowed eyes; and at once their lips were pressed together, hands roving, and they stumbled backwards through the library doors and into Irma's office.
Irma's silent library, it would seem, would have to come at a later time.