Jake trudged into the Library study area looking downright miserable. Ink was smudged all over his left hand and there was a little on his neck and left earlobe. In his clean hand, to ensure they weren't spoiled with ink (though it didn't matter, as that's how his hand got all inky in the first place) were Jake's Arithmancy notes.

Peering into the room, Jake noticed a familiar figure; his friend Cameron. He'd said they'd meet soon at the Library, and here they both were. As Jake sneaked up, he noticed Cameron had made a mess with the ink. Crouching down to his sitting height, Jake murmured in his friend's ear, "Tut tut, befouling the tables."

Hopefully that'll make the boy jump. Serves him right, getting Slytherin all them points.