15750223GOT00
1575, February 23
Gottorf
Duke Adolf of Holstein-Gottorp to king Frederick II of Denmark: has prepared a ship to sail to Iceland to collect fish and sulfur, and requests passes for free passage in the North and South of Iceland, and in the Øresund.
Copenhagen, Rigsarkivet
Særligt stillede landskaber og unionsriger: D 11 Island og Færøerne, Pakke 24 (Supplement II, no. 10)