The most important import and export were still wine and wool, respectively. The port was also an important departure point for English armies on their way to France. A shipbuilding industry began, constructing naval ships for the Hundred Years' War. The most notable ship built during this era was HMS Grace Dieu, the flagship of King Henry V. She was built in 1418 by William Soper, a burgess of Southampton and clerk of the king's ships, in a dock built for the purpose near Watergate Quay. This quay, dating from 1411 on the site now occupied by Town Quay, was the centre of the town's port activities. She was more than long, with a displacement of around 2,750 tons (tonnes) (making her similar in size but different in appearance from HMS Victory). She was destroyed by fire on the river Hamble in 1439. Trade with Genoa and Venice began and flourished, traders bringing luxuries (such as perfumes, spices and silk) and cargoes of alum and woad (used to dye wool) and returning with English wool and cloth. Southampton became one of England's most important ports, after London and Bristol. The name 'Southampton' came into use partly to eliminate confusion between this Hampton (in the kingdom of Wessex) and another Hamtun/Hampton (in the kingdom of Mercia); the latter became Northampton. In 1620, the Pilgrim Fathers (also known as Pilgrims or English Separatists) departed from Southampton for North America on the Mayflower and Speedwell. The Speedwell had come from Holland to meet the Mayflower before crossing together. However, she was leaky and put into Dartmouth and Plymouth for repairs. There are reports that crew members who did not want to make the voyage sabotaged her. She was deemed too unreliable to attempt the crossing; personnel and stores were transferred to the Mayflower, who completed the passage alone. The 16th and 17th centuries were another period of decline for Southampton, as other ports (such as London) competed for business. The Italian trade dwindled, and the port was generally quiet until the second half of the 18th century. There was a period during which Southampton was better known as a fashionable spa town and sea-bathing resort than as a port. Modern era Trade gradually increased, and soon the port was handling wine and fruit from Spain and Portugal; grain from Ireland and eastern England; woollen stockings from the Channel Islands; slate and building stone