Chapter 1: Section 1: Page 3: Lines 5-6

 "Hurrah! Up we go!"

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In the previous section about Line 4, I forgot to mention that an astute reader with a glancing knowledge of geography might have been confused by the number of nanoseconds it took them to read the next few lines before getting to the phrase "hydrogen skyship." They might have put the book down, looked up quizzically from the uncomfortable chair at the mall turned slightly askew from the table to face Cajun Grill (for reasons they don't need to explain to their wife), and muttered, "Wait a second! Who takes a ship to Chicago?!" Then a stranger sitting next to them with a better than glancing knowledge of geography (is "glancing" even a word that works here? It's meant to convey somebody who really doesn't know that much but knows enough to always be confused by it) might respond, "Probably somebody living on the other side of Lake Michigan, I reckon." Then the first person might have felt a bit humiliated and slammed the heavy book down on the table, startling the attractive clerk at the Cajun Grill, and refused to read any more.

Or maybe I didn't forget to mention all that and was just a little bit embarrassed about it until I thought of a way to tell it as if it happened to a hypothetical person. What that story was meant to get at is that this sentence, "Hurrah! Up we go!" helped that hypothetical person to realize that this wasn't a story about a boat at all (the only story I know about a boat ends with the phrase "out bored Motor" and it was the first Shaggy Dog story I ever knew and one I told to all of my friends to the point that at least one of my friends continued to tell it while making it even longer and more shaggy). If they were a particularly astute reader, they may have thought, "Oh! This is a story about a balloon!" Also if one of their friends once described Against the Day  as "Mason & Dixon in a balloon," they might have remembered that as well.

"Up we go!" also doesn't need to connote a direction; it could be referencing a state of mind. We're going up now into our imagination! Leave the old rules and status quo ways of those Earth-bound jerks behind! We're going elsewheres!

Also the "Hurrah!" is more of that general excitement of the traveler before a long, 1000 page journey! So exciting!