The project records are organized according to Muschenheim's original filing system in which he interfiled the drawings, correspondence, specifications, and other papers for each job. There are a total of 130 numbered jobs (with gaps between jobs 11-17, 25-26, 28-29). Each job number may represent more than one project. Each client received a single job number no matter how many projects Muschenheim may have done for them. The drawings have been removed from the original files and stored and cataloged separately (see Series I). Unlike the architectural drawings in this collection, the project records have not been previously digitized.