Horsing around with scale bars
Apropos a previous post on the different measurement systems used in early modern cartography, I just came across this example that is unique (to me at least).
I’m not positive, but it looks like the top bar indicates the distance one can travel in an hour on horseback, i.e. 2 heur[es] de ch[eval]. Of course it’s annoying that they don’t left justify the two bars, so you can directly compare the 1 hour to the number of Piemont milles.
Notice how the French text beneath the bars also lets the reader know that four Piemont milles (“miles” or “thousands”) equal two French lieus (leagues), each of 2500 toises. It ain’t easy being an early modern.