The project series contains correspondence, specifications, contracts, invoices, financial statements, advertisements, photographs, memoranda, and other materials pertaining to the Company's projects in forty states (including District of Columbia), four Canadian provinces, and eleven other foreign countries. The dates of the materials span 1866-1985. Also included are materials added to the collection by Prof. Collins during his research (e.g., citations, work notes, photographs, magazine and newspaper clippings, and correspondence). The amount of materials in the project folders vary from one item to multiple folders.
The folders in this series were also arranged by Prof. Collins. They begin with the Company's projects in foreign countries, followed by projects in the United States. For projects in the U.S., the folders are in alphabetical order by state, and thereunder by city. However, cities with greater number of projects, e.g., New York City, are filed before other cities. Given the large number of projects in New York City, these files were subdivided by borough and building type.