Homestuck: Act 3

The third act of Homestuck. It begins here.

Important events are listed as follows:
 * We see a letter that Nanna wrote to John in the old copy of Colonel Sassacre's, demonstrating a mysterious foreknowledge of Sburb.
 * Jade Harley is formally introduced and named.
 * Jade enters the story right around when John is getting ready to go get his mail.
 * Jade goes to her bedroom.
 * As Jade plays her Eclectic Bass in her bedroom, a present from John arrives outside her house via airmail.
 * Jade gets some supplies and prepares to feed Bec right around when John has just retrieved the Sburb beta.
 * Meanwhile, in the present, Dave is in Strife with his Bro to retrieve the Sburb server beta.
 * John is doing battle with the Crude Ogres.
 * In the future, the Peregrine Mendicant is confronted by a pesky worm sentry eating one of his/her mailboxes.
 * Rose explores the Laboratory and prepares to reconnect her laptop, but an ominous timer is ticking. Can Dave bail her out in time?
 * Jade descends to the bottom floor, and is pestered by a troll named carcinoGeneticist.