Sir Thomas Gresham
Gresham, Sir Thomas (grĕshˈəm) [key], 1519?–1579, English merchant and financier. As the royal financial agent in Antwerp after 1551 he proved himself very able, though his methods were frequently more effective than ethical. After the accession of Elizabeth I to the throne he spent most of his time in London but went on diplomatic and financial missions. He also accumulated a great private fortune as a banker, mercer, and merchant. He was the principal figure in the founding of the Royal Exchange, and he endowed Gresham College in London. His name was given to Gresham's law, the economic principle that in the circulation of money "bad money drives out good," i.e., when depreciated, mutilated, or debased coinage (or currency) is in concurrent circulation with money of high value in terms of precious metals, the good money is withdrawn from circulation by hoarders. It was thought that Gresham was the first to state the principle, but it has been shown that it was stated long before his time and that he did not even formulate it.
See J. W. Burgon, Life and Times of Sir Thomas Gresham (2 vol., 1839, rep. 1968); biography by F. R. Salter (1925).