Interesting stuff Al, my Mum has letters from ancestors of hers who were trading with Macao, Tartary*, in the early 1700s, details of the epic sea voyages, the walled enclosures there where Dutch, French, Protugese**, and English*** traders were housed and only allowed out of for trading appointments and journeys to and fro. Most of the letters were sent from there, as they spent months at a time living there, and the letters are all Cross Written: lines of text running horizontally and superimposed vertical text to save paper.
* As in the letters, China
** Those Protugese are comin' only from Protugal (© Willium/Mate, Spike Milligna, The Goons)
*** In those days "England" and "English" included Scotland, Wales and Ireland