Despite hopes that I would get back to working on monsters over my holidays, it turns out that obligations outweighed my time, and what I could find left me with too thick a head to work on my biology table. Making maps was much less cerebral, so that is what I continued to do this last week.
Principally, I tackled the undesirable task of working out Holland's coastline. The problem is that modern maps are quite different from the reality of 1650, the date of my world, since Holland has continued to expand its territories through the building of polders for a great many centuries. However, I was lucky enough to find this map, produced by Jan Janssonius in 1658: