Harry moved the tip of his eagle-feather quill down the page, frowning as he looked for something that would help him write his essay, " Witch Burning in the Fourteenth Century Was Completely Pointless discuss."
“You — Potter — why didn't you tell him not to add the quills? Thought he'd make you look good if he got it wrong, did you? That's another point you've lost for Gryffindor.”
Dean Thomas, who was good with a quill, had offered to forge Uncle Vernon's signature on the form, but as Harry had already told Professor McGonagall he hadn't had it signed, that was no good.
There was a sudden rummaging for quills and parchment. Over the noise, Snape said, " And a point will be taken from Gryffindor House for your cheek, Potter."
He therefore set off along the corridor again, passing nobody but a frowning wizard who was murmuring instructions to a quill that floated in front of him, scribbling on a trail of parchment.
By virtue thereof, it is true that the need for mutual warmth will be only imperfectly satisfied, but on the other hand, the prick of the quills will not be felt. End quote.