Sweden. Courier mail. Very early and rare courier letter from Duke KARL (IX) (King of Sweden from 1599), dated and signed "Carolus" in Nyköping May 16, 1593, to Jönsson in Stockholm. Notation on front about arrival May 23 by Erik Jöransson (Ulfsparre), which served Karl for many years to come. Full written content and part of his large paper seal still attached. The letter has unfortunate got some moisture stains and has become soiled on the outside.