Maddison was born at Fonaby, Lincolnshire, probably in 1571 and died in London, most likely in late 1655. Of his early life little is known, but he appears to have made himself useful to the newly crowned James I of England (VI of Scotland), and was knighted for services to the crown in 1603. He became something of an expert on commercial affairs, and was frequently employed by the king as an adviser and emissary; he served on the commission of inquiry into the woollen trade in 1622. He continued to advise Charles I, but was less close to the king. In his later years he became a recognized expert on matters relating to currency, and he was a strong opponent of debasement, believing that the strength of sterling had been one of the foundations of English economic Power since the fourteenth century. Following the civil war he was employed by the mint, particularly as an advisor on the value of gold.
From The Biographical Dictionary of British Economists in Oxford Reference.