A map thought to be the oldest accurate chart of the Scottish coast will be auctioned in Edinburgh on Wednesday.
Known as the Nicolay rutter, it is said to have been drawn up after James V's voyage around the country in 1540 and is far more accurate than other 16th and 17th-century maps.
Lyon & Turnbull, the auctioneers, have valued the map at between £15,000 and £20,000 and it has attracted interest from international bidders.
The rutter, which takes its name from the French word routier, is a set of sailing directions. The title page refers to the king's trip to subdue the unruly Western Isles. He sailed via Orkney, Skye, Lewis, Ross and Kintail, and continued by sea to Dumbarton.
The creator of the