Chapter 22, there's another anomaly: The phrase: "gave a view hallo!" of a shopkeeper upon spotting the invisible man (clothed) whom they've been chasing about a department store.

Google turns up some curious results (a painting, the script of Mary Poppins, a ghoulish method of execution) but no definition that I can find.

(It's not a typo this time; I checked with Amazon ;\) )