The Herbert E. Valentine Papers includes scrapbooks, diaries, correspondence, sketches, photographs, printer's blocks, newspaper clippings, and books created by Valentine both during and after the Civil War.

The Massachusetts Volunteer Militia Records includes orderly books, rosters and enlistment records, quartermaster accounts, guard report books, general orders and brigade orders, muster rolls, company descriptive books, and correspondence. This collection has been arranged into twenty-two series based on regimental distinctions.