The series Project Files contains material related to the architectural jobs worked on by Eric F. Hyde, Mechanical Engineer and later Hyde & Bobbio, Inc. The projects have been arranged by job number, except for the first four projects, which do not contain a job number. Job Numbers 119 to 631 are projects undertaken by the practice when it was only Eric F. Hyde. Job Numbers 48-69 to 67-11 represent projects undertaken by the practice after the addition of Joseph S. Bobbio. When available, the project's architect and location have been provided. The project files contain architectural drawings supplemented with paper records. The paper records consist of correspondence between Hyde or Bobbio and the projects' architects, mechanical specifications, data sheets, and project accounts. In many instances, only architectural drawings remain and in some instances, only paper records remain. The majority of the drawings are blueprints but there is a small number of ink on linen architectural drawings. Architectural drawings include both folded drawings and rolled drawings. Folded drawings can be found in the project files and the rolled drawings can be found in tubes. The tubes contain only architectural drawings.
There are many instances when drawings predate Eric F. Hyde's mechanical engineering practice. The reason for this is Hyde or Bobbio were sometimes brought in during a building's renovation and were provided with the original plans for that building. For example, Hyde worked on the Veterans' Club in Detroit (job number 147). However, since the Veteran's Club occupied the former Detroit Museum of Art, the project files contain the floor plans of the former Museum. Another example is the store building for the Paterson Development Corporation (job number 152). In the late 1920s, the building was renovated under the guidance of architects Stratton & Hyde. However, architect George Mason originally designed the building in 1909. As a result, the project file for this project contains the original George Mason blueprints from 1909.