People used to write on paper twice, the second after rotating 90 degrees. And that was in modern times. I imagine paper was quite dear for most of the period s

People used to write on paper twice, the second after rotating 90 degrees. And that was in modern times. I imagine paper was quite dear for most of the period since humans created it. It is only fairly recently that it became very cheap. https://en.wikipedia.org/wiki/History_of_paper#19th-century_advances_in_papermaking https://en.wikipedia.org/wiki/History_of_paper#19th-century_...