Who: Z and Greta
Where: Equipment sheds by the Quidditch Pitch
When: 23 December, late in the morning
What: Mysterious Goings-On in the Broom Shed
Greta hadn't figured out yet whether the rattling cupboard in her office contained a pair of restless Bludgers or something more ominous, but she definitely wasn't planning to figure it out on her own. She'd already found a Snitch hiding under her desk that morning, and it had nearly taken one of her fingers off before she'd managed to trap it under a teapot and wrestle it into safe confinement.
She was still investigating her desk for other potential hazards when the referee's whistle that had been quietly hanging by the door suddenly lifted itself into the air and let out a series of sharp, piercing shrieks.
"Intruder in the broom shed," it cried, "alert, alert, intruder -" Greta hit it with a Silencing spell as quickly as she could and jogged out of her office, heading for the equipment sheds to investigate.