My first step will be to find references to use. I googled various search terms...knights, shields, cartouches, compass roses etc, but didn't really find what I was looking for.
I then remembered that I had Heck's Pictorial Archive of Military Science, Geography and History
Click on the link to go to Amazon. This is quite simply a brilliant reference work for the sort of mapping we do. I've scanned three pages of the 200 or so, for the references I was after which I attach below. I'll continue to collect references for the work but I may not post them all as this is intended as a diary of how I am approaching the process.