This article was published in Journal18: a journal of eighteenth-century art and culture, Issue 5: Coordinates: Digital Mapping and 18th-Century Visual, Material, and Built Cultures (Spring 2018), co-edited by Nancy Um and Carrie Anderson. The article layout was by Nancy Um on Quire, a digital publication framework developed by Getty Publications. Special thanks are extended to Greg Albers, Digital Publications Manager, J. Paul Getty Trust, who offered extraordinary support and indispensable consultation throughout the process.