punctuation

I don't have the reputation to comment on @Alexa's post connecting Wodehouse and "zareba", but I tracked down an example of Wodehouse's usage in this context. In his story "Something to Worry About", he writes (emphasis mine):

The dramatist brings down the curtain on such speeches. The novelist blocks his reader's path with a zareba of stars. But in life there are no curtains, no stars, nothing final and definite—only ragged pauses and discomfort. There was such a pause now.

(Available on Project Gutenberg.)

It looks like Wodehouse liked to use "zareba" in a variety of contexts describing metaphorical enclosures or fortifications, not just referring to a section break, e.g., "Vladimir Brusiloff had permitted his face to become almost entirely concealed behind a dense zareba of hair", "Mr. Benham’s eyes opened behind their zareba of glass.". Based on this, certainly seems plausible Wodehouse was the origin of the term in a typesetting context!