I decided to cheat a little bit and post something from this past summer. This is the inside of a letter I illustrated in the style of an old nautical map. I did a bit of research for this one using the ole' interwebs to find authentic looking Maritime illustrations and I combined the elements that I liked into the drawing below. If you click on the tiny image below it will take you to a much larger one. This is encouraged by management.
I really like this style and wish it wasn't so time consuming, otherwise I would probably draw in it more frequently. It would be more apt for an etching so that multiple copies could be made and sold as individual greeting or post cards.