Snape was no less obviously partisan; he had booked the Quidditch pitch for Slytherin practice so often that the Gryffindors had difficulty getting on it to play. He was also turning a deaf ear to the many reports of Slytherin attempts to hex Gryffindor players in the corridors. When Alicia Spinnet turned up in the hospital wing with her eyebrows growing so thick and fast they obscured her vision and obstructed her mouth, Snape insisted that she must have attempted a Hair-thickening Charm on herself and refused to listen to the fourteen eye-witnesses who insisted they had seen the Slytherin Keeper, Miles Bletchley, hit her from behind with a jinx while she worked in the library.…