The bloody bed sheet

At that precise moment, a strangled yell echoed down the boys' staircase. The whole common room fell silent, staring, petrified, at the entrance. Then came hurried footsteps, growing louder and louder — and then Ron came leaping into view, dragging with him a bed sheet.

"LOOK!" he bellowed, striding over to Hermione's table.

"LOOK!" he yelled, shaking the sheets in her face.

"Ron, what —?"

"SCABBERS! LOOK! SCABBERS!"

Hermione was leaning away from Ron, looking utterly bewildered. Harry looked down at the sheet Ron was holding. There was something red on it. Something that looked horribly like—

"BLOOD!" Ron yelled into the stunned silence. "HE'S GONE! AND YOU KNOW WHAT WAS ON THE FLOOR?"

"N — no," said Hermione in a trembling voice.

Ron threw something down onto Hermione's rune translation. Hermione and Harry leaned forward. Lying on top of the weird, spiky shapes were several long, ginger cat hairs.

***

Harry Potter and the Prisoner of Azkaban Chapter 12: The Patronus