The History Room collects archival materials pertinent to the member communities of Patten Free Library, while maintaining a reference collection of genealogical material and local histories from the entire state. In addition, there are numerous collections of period photographs, ledgers, letters, postcards, publications, Morse High School yearbooks, Bath regional directories, and Sagadahoc Preservation Inc. architectural surveys, as well as maps, cemetery records, and microfilmed local newspaper and real-estate tax records.