Jan Willem Veluwenkamp, Ph.D. (1981), was associate professor of early modern history at the University of Groningen until he retired in 2017. He has published on commercial history, including Archangel. Nederlandse ondernemers in Rusland, 1550-1785 (Amsterdam, 2000).Werner Scheltjens, Ph.D. (2009), is assistant professor at the University of Leipzig. He has published widely on preindustrial maritime history, including Dutch Deltas. Emergence, functions and structure of the Low Countries maritime transport system ca. 1300-1850 (Brill, 2015).