This is the third part of a four-part, semester-long project. The first part consisted of finding a site; the second, to find evidence of its environmental history and ongoing natural processes. Now the task is to trace changes on your site over time by comparing its character at several points in time, using maps. You may find different kinds of changes: Land use, density of settlement, additions to buildings, ownership, transportation. The types of sources you will find helpful are historical maps, especially nineteenth and twentieth-century atlases, and may also include plans, prints, and photographs.