Portuguese in 1561. The Bartons operated down the east coast of Britain from Leven and the Firth of Forth, while others used the French Channel ports such as Rouen and Dieppe or the Atlantic port of Brest as bases. In 1507 Robert Barton with Lion took a Portuguese ship, but was detained by the Dutch authorities at Veere for piracy. James IV managed to engineer his release, but in 1509 John Barton with Lion took a Portuguese vessel that was carrying Portuguese and English goods. In 1511 Andrew Barton headed south with Jennet Purwyn and another ship to continue the private war, and took prizes that he claimed were Portuguese, but contained English goods. He was intercepted in the English Downs by Lord Thomas Howard and Sir Edward Howard. Barton was killed and his two ships captured and transferred to the English navy. James V James V entered his majority in 1524. He did not share his father's interest in developing a navy, relying on French gifts such as Salamander, or captured ships like the English Mary Willoughby. Scotland's shipbuilding remained largely at the level of boat building and ship repairs and fell behind the Low Countries which led the way into semi-industrialised ship building. Despite truces between England and Scotland there were periodic outbreaks of a guerre de course in the 1530s with at least four of a known six men-at-war were royal naval vessels on the Scottish side. James V built a new harbour at Burntisland in 1542, called 'Our Lady Port' or 'New Haven,' described in 1544 as having three blockhouses with guns and a pier for great ships to lie in a dock. The chief employment of naval power in his reign was in a series of expeditions to the Isles and France. In 1536 the king circumnavigated the Isles, embarking at Pittenweem in Fife and landing Whithorn in Galloway. Later in the year he sailed from Kirkcaldy with six ships including the 600 ton Mary Willoughby, and arrived at Dieppe to begin his courtship of his first wife Madeleine of Valois. After his marriage he sailed from Le Havre in Mary Willoughby to Leith with four great Scottish ships and ten French. After the death of Queen Madeleine, John Barton, in Salamander returned to France in 1538 to pick up the new queen, Mary of Guise, with Moriset and Mary Willoughby. In 1538 James V