Sweden. Courier mail. Two letters with full content, signed by GUSTAF IV ADOLF (1778–1796–1837), King of Sweden –1809, to the Captain-Lieutenant von Rosen at HKH Duke of Södermanland (later Karl XIII) Drabant Corps. The first dated Stockholm Castle December 3, 1802 and mentioning the birth of Prince CARL GUSTAF (1802-1805) and his title "Grand Duke of Finland". The second is dated Stockholm Castle March 9, 1803 and mentioning some military organisational things. Scarce items in good quality!