Timothy J Horsley Horsley Archaeological Prospection, LLC, Department of Anthropology, Northern Illinois University No description specified. 1-2 (2 Records) Documents Going Over Old Ground: developing effective geophysical survey methodologies for Maryland’s archaeological sites (2016) A Search for the Fort at St. Mary’s City: Results of a Tripartite Geophysical Prospection Survey at Historic St. Mary’s City, Maryland (2019)