The Pusey & Jones Corporation were shipbuilders, founders, and machinists of Wilmington, Delaware, which later expanded into papermaking machinery manufacturing. The Parsons Engineering Company was established for the manufacture of smoke-consuming devices and innovations with railroad technology. This collection includes papers from the Pusey & Jones Corporation and Parsons Engineering Company.

The Pusey & Jones Corporation were shipbuilders, founders, and machinists of Wilmington, Delaware, which later expanded into papermaking machinery manufacturing. The collection primarily contains correspondence between Horace H. Thayer Jr. (1878-1959) and Thomas H. Savery (1837-1910) regarding matters of importance to the company.