and to a role as a stannary town for assaying and stamping tin and copper from Cornish mines. The Black Death brought a trade recession and an exodus that left the town in a very neglected state. Trade and prosperity gradually returned in the Tudor period. Local government came in 1589 with a new charter of Elizabeth I giving it an elected mayor and control over the port of Falmouth. During the Civil War in the 17th century, Truro raised a sizeable force to fight for the king and a royalist mint was set up. Defeat by Parliamentary troops came after the Battle of Naseby in 1646, when the victorious General Fairfax led his army south-west to relieve Taunton and capture the Royalist-held West Country. The Royalist forces surrendered at Truro while leading Royalist commanders, including Lord Hopton, the Prince of Wales, Sir Edward Hyde, and Lord Capell, fled to Jersey from Falmouth. Later in the century, Falmouth gained its own charter, giving rights to its harbour and starting a long rivalry with Truro. The dispute was settled in 1709 with control of the River Fal divided between them. The arms of Truro city are "Gules the base wavy of six Argent and Azure, thereon an ancient ship of three masts under sail, on each topmast a banner of St George, on the waves in base two fishes of the second." Truro prospered in the 18th and 19th centuries through improved mining methods and higher prices for tin, and its consequent attraction to wealthy mine-owners. Elegant Georgian and Victorian townhouses of the period can be seen today in Lemon Street, named after the mining magnate and local Member of Parliament Sir William Lemon. Truro became the centre for county society, even dubbed "the London of Cornwall". Through those prosperous times Truro remained a social centre. Among the many notables were Richard Lander, the first European explorer to reach the mouth of the River Niger in Africa and was awarded the first gold medal of the Royal Geographical Society, and Henry Martyn, who read mathematics at Cambridge, was ordained and became a missionary, translating the New Testament into Urdu and Persian. Others include Humphry Davy, educated in Truro and the inventor of the miner's safety lamp, and Samuel Foote, an actor and playwright from Boscawen Street. Truro's importance increased later in the 19th century with an iron-smelting works, potteries, and tanneries.