As chronicled in your researcher's journal as I researched my history of early lifestyles in South Asia...
A professor at Cambridge told me to be very careful to avoid slang in my
nonfiction. Here's a good example from an archaeological journal of
when someone should have been given the same advice; it's from 1983: "We
are working on the fag end of the era." It just sounds out of place in
an otherwise well done report, to be suddenly mentioning a cigarette...
Current time travel apparatus location: The Round Library, Bangalore, India