The 1st Regiment Massachusetts Volunteer Heavy Artillery Association Records includes by-laws, correspondence, rosters, record books, member surveys, sketchbooks, journal transcripts, and newspaper clippings. The collection has been arranged into two series.

The 23rd Regiment Massachusetts Volunteer Infantry Association records include meeting minutes, correspondence, reunion programs and invitations, scrapbooks, photographs, and newspaper clippings created and collected by elected officers and members of the 23rd Regiment Association. The collection has been arranged into three series.