How large is this map supposed to be? I ask because the scale of the hatching used as fill seems off. I've done some work on reproduction of that era myself, and in my experience the hatching is usually at between 60 and 80 lines to the inch. That would make your map about six inches tall, which seems a little on the small side.

In addition, the hatching on the seas looks good, a bunch of parallel dark lines. On land, though, it looks strange, more like Venetian blinds. Zooming in shows that the land hatching is a repeated pattern of four pixels (at this resolution), proceeding from light to light-ish to dark-ish to dark, then immediately back to light. How is this produced?