The Allan D. Colvin papers (MC 35), 1906-1951, contain clippings, programs, etc. from his service on the Groton-New London Bridge Commission, scrapbook entries concerning events in his life and miscellaneous correspondence received from colleagues at the Connecticut Power Company after 25 years of service. Apart from this small amount of material, the collection contains no information regarding Allan Colvin's administration, Connecticut Power Company or the Hartford Electric Light Company. Allan Colvin's papers also include a specimen of RPI Prof. Dwinel Thompson's hieroglyphic marking system (ca. 1906), accounts of the coin collection which Allan and his father acquired, various certificates, and letters of condolence to his widow upon his death. The papers of Henry Colvin comprise scrapbook entries, miscellaneous certificates, and a resolution of appreciation and condolence passed upon Mr. Colvin's death by RPI Board of Trustees.