Paul Sivitz earned his PhD from Montana State University in 2012. His research focuses on early America, the history of science, and mapping late eighteenth-century Philadelphia. Currently, he teaches at Idaho State University.
Several experts in GIS have generously helped create the maps. The project would have been impossible without their dedication. Professor Stuart Challendar, Earth Sciences, Montana State University http://www.montana.edu/wwwes/facstaff/challender.htm organized the project, directing a team of graduate and undergraduate students. Our deep appreciation to Alex Schwab, Alice Hecht, and Tara Chesley-Preston for producing such wonderful and useful maps.