There were rarely teachers on the train, and when there was it always caused something of a stir. However, there was normally no exciting or outlandish reason, in some cases it was simply nostalgia which inspired their decision, or occasionally they accompanied a package which could not be sent by other means. Professor Slughorn's reasons for requesting passage on the train were perhaps a little less noble. His favourite students would be returning, and on the platform there would be their parents, some of whom were also favoured once upon a time. A little socialising before returning to the cold castle would be welcome.