Johannes De Laet was a Leiden merchant and one of the directors of the Dutch West India Company. He also moved in the learned circles of Leiden University and was a good friend and assistant of professor Claude Saumaise. Apart from his business activities De Laet was also successful as a compiler of geographical descriptions and some works on the ancient classics. https://www.roneverhart.com/Ferrofish-A32pro-32-Channel-AD-DA-Converter-with-MADI-and-ADAT-p18115/