sentences:  He argued that international movements of money and fluctuations in the exchange rate depended upon the international trade flows and not the manipulations of the bankers, which was the popular view at the time.He suggested that trading returns should be established for purposes of statistical analysis, so that the state could regulate trade with a view to obtaining export surpluses.He was deputy-governor of the Merchant Adventurers' Company at Delft from 1623 until 1633.