This collection contains clippings, programs from Colvin's service with the Groton-New London Bridge Commission, scrapbook entries and correspondence from the Connecticut Power Companyand miscellaneous certificates.

The Sanford L. Cluett Papers consists of notebooks and oversize certificates. The notebooks pertain to Cluett's days as an R.P.I. student as well as notebooks related to his professional career with the Walter A. Wood Mowing & Reaping MAchine Co. The oversize certificates include certificates of appreciation, and pieces relating to memberships (such as ASME) and the military.