Upstairs, [Harry] overhears [Molly Weasley] sobbing, and rushes in to see her attempting to fight a [boggart] - except it's alternately taking the form of all of her family members, dead. [Lupin], [Sirius], and [Moody] soon arrive and Lupin does off the boggart before comforting Molly, telling her how much better prepared the [Order of the Phoenix] is for [Voldemort] this time around.
Back in his bedroom alone, [Harry] thinks about the danger in front of the [Order of the Phoenix], feeling older than he ever has in his life.
Chapter 10 - "Luna Lovegood" - In which Harry and the Weasleys are late for the Hogwarts Express (again), Harry and Ginny encounter Neville on the train, and they are introduced to Luna Lovegood and her father's magazine, The Quibbler. Cho Chang makes a brief appearance, and Harry sees what actually pulls the school carriages.
All night [Harry] has bizarre dreams, of his parents, of the day's events, and of a corridor with a locked door.
[Ron] wakes [Harry] up and together they rush to make it out the door in time to catch the [Hogwarts Express]. [Sirius] comes along disguised as a dog as a rather large group walks to [Kings Cross Station], and they all just make it on the train before it departs.
Harry Meets Luna Lovegood
Once on the [Hogwarts Express], [Harry] realizes that [Ron] and [Hermione] have to go with the [prefects], and sets off instead with [Ginny], and then [Neville], to find a compartment.
[Harry], [Ginny], and [Neville] settle into a compartment with [Luna Lovegood], who Harry finds odd but somewhat entertaining. As the train moves along, Neville shows off his [Mimbulus mimbletonia] and douses everyone in [Stinksap], [Cho Chang] stops by to say hello to Harry, and the trio generally enjoys the trip.
[Ron] and [Hermione] arrive, talking about the new [prefects], but [Luna] soon joins the conversation, perplexing everyone else. [Harry] then reads her [Quibbler] with some interest, though Hermione quickly offends Luna with her insensitive comments about the magazine, which [Mr. Lovegood] publishes.
Malfoy Recognized Sirius
As [Luna] takes back her magazine, [Draco Malfoy] arrives, slinging around a few insults - and demonstrating that he knew the dog was [Sirius] - before [Hermione] kicks him out.
With [Malfoy] gone, [Harry] and [Hermione] worry silently about his comment concerning [Sirius]. Finally the [Hogwarts Express] approaches the school, and the gang changes into their [robes] before disembarking.