Thanks D. I tried most of the fonts in my collection. I didn't want to go with a caligraphic or hand written style so settled on that one.
edit: GARAMOND expanded is probably authentic but it is also quite boring.
I looked at a few maps from th 1600s and it seems they liked to use a whole lot of lettering styles on the one map. To me a lot of those maps look cluttered and overdone, with elaborate cartouche that take up 20% of the page. And oceans filled with serpents and flying fish. I certainly don't want to emulate that look.