It is with great pleasure that I acknowledge the crucial role of many friends and colleagues in the completion of this book. This project would not have been started - nor finished - without the support of my doktorvater]an Roegiers. Charles Burnett and Jill Kraye graciously agreed to supervise my work during a crucial stay at the Warburg Institute. Time and again, members of the Louvain Seminarium Philologiae Humanisticae proved to be the heirs of a time when disciplinary boundaries were less constraining than they have since become. Jan Papy deserves special mention among them. Robert Westman made me aware that others traveled equally unfamiliar grounds. His critical comments on early drafts were particularly stimulating, as was the advice of Fernand Hallyn, John North, Geert Vanpaemel, and Christoffel Waelkens. Much later, Christoph Lüthy heroically read through the entire final draft.
Many others offered valuable assistance, advice, and encouragement: Daniel Anderson, Gera van Bedaf, Paul Bockstaele, Wouter Bracke, Guido Cloet, Nicholas Clulee, Elly Cockx-Indestege, Chris Coppens, Andreas De Block, Gerard l’Estrange Turner, James Evans, Steve Farmer, Guido Giglioni, Anthony Grafton, Guido Gubbels, Wouter Hanegraaff, Darin Hayton, Stephen Johnston, David Juste, Robert Kargon, Robert Karrow, Allison Kavey, Daryn Lehoux, Jean Meeus, Ad Meskens, Adam Mosley, Jan Opsomer, Sophie Page, Lawrence Principe, Hilde de Ridder-Symoens, H. Darrel Rutkin, Jole Shackelford, Carlos Steel, Jacques Vandamme, Koenraad Van Cleempoel, Toon Van Houdt, and Shirley Yoo.
The Fund for Scientific Research of Flanders (FWOV) was particularly generous in funding the research on which most of this study is based. Further changes and revisions were made possible by a Frances Yates fellowship from the Warburg Institute, a travel grant from the Wellcome Institute, and a postdoctoral fellowship from the Johns Hopkins University.
Excerpts from my paper “Dee, Mercator, and Louvain Instrument Making: an Undescribed Astrological Disc by Gerard Mercator (1551),” published in Annals of Science, 58 (2001), pp. 219–40, were