Design for Poster and scaled down for pamphlet

I need an A3 poster design - four colour - specifically a beautiful and authentic-looking medieval style map based on a sketch which will be provided, containing all text, scale and information. Essentially you'll need to be able to do lettering, and to look imaginatively at the sketch and interpret it creatively in your own way - lovely job for the right person! I shall also need a black and white line drawing - scaled down/reduction/simplification of poster design - for production of a pamphlet.