Anne Kelly Knowles is Associate Professor of Geography at Middlebury College. She previously taught at the University of Wales, Aberystwyth; Wellesley College; and George Washington University. Her books include Calvinists Incorporated: Welsh Immigrants on Ohio’s Industrial Frontier (University of Chicago Press 1997), Placing History: How Maps, Spatial Data, and GIS Are Changing Historical Scholarship (ESRI Press 2008), and three other edited volumes on the use of GIS in historical research. Anne’s current book project, Mastering Iron: The Struggle to Modernize an American Industry 1800 – 1868 (under contract with University of Chicago Press), has been supported by fellowships from the American Council of Learned Societies and National Endowment for the Humanities. Her ongoing research with the Holocaust Historical GIS project is funded by the National Science Foundation.