A book such as this relies heavily on archival research and thus much travel, and would not have been feasible without time away from the lecture theatre, which was enabled by a VENI research fellowship from the Netherlands Organization for Scientific Research (NWO), and a one-year visiting fellowship at the Netherlands Institute for Advanced Study in the Humanities and Social Sciences (NIAS-KNAW). An Aspasia stipend, also awarded by NWO, allowed me to make some further, final archival trips, finetune drafts, and pay for reproductions and image rights. This book has received close attention at Oxford University Press; I am grateful that Cathryn Steele welcomed the project enthusiastically. Even though the following list of debts is long, any remaining mistakes are mine.