Can you tell me how to get back to Roundworld?

Before starting Night Watch this morning (I listened to Les Mis yesterday and there are lilacs busting into bloom all over so it was imperative) I had been reading Carpe Jugulum and was particularly struck by the strong visual impression this scene made on me:

It's Agnes Nitt being taken on a fly by Vlad Magpyr (who does look a bit like a genetic experiment to combine Tom Riddle and Draco Malfoy). I don't know if the sense of space comes across as clearly in pencil lines as it does in the full-colour mental movie complete with a slight BG drift, but ... I try.

11:57 am
If Esme Weatherwax had been the one to go to Shiz instead of Elphaba ... Wicked would be an entirely different story.
And probably a lot more interesting.
[ducks]

Now we sing dis stupid song!
Sing it as we march along!
Why we sing dis we don't know!
We can't make der words rhyme prop'ly!
Sound off! One! Two!
Sound off! Many! Lots!
Sound off! Er ... what?

(Edited to add the end bit and thus discourage further confusion with other rabble-rousing anthems)