First edition of John Keymors' Observation Made upon the Dutch Fishing (1664), a landmark work of early English political economy. Written around 1601 and published during the Anglo-Dutch commercial rivalry, the tract argues that Dutch prosperity rested upon the fisheries of the British seas and that herring generated more wealth than Spain's American silver. An important Kress 1725 item linking maritime commerce, national wealth, and the origins of mercantilist thought