More witches and wizards in lime-green robes walked in and out of the doors they passed; a foul-smelling yellow gas wafted into the passageway as they passed one door, and every now and then they heard distant wailing.
In the first place, short vacations set the students free from the burdensome study every now and then, which is beneficial for both of their physical and mental health.
" We can do Diss-lusion Charms now! And then, " his face split into a gormless grin, " you turned up right in front of us and said you was looking for a die-dum! What's a die-dum? "
But the overall impact highlights the novel's underlying themes: the hypocrisy of many but compassion of some; the way craven people get the callous rulers they deserve, yet now and then rise to a nobility that deserves better.