The William Ingram Collection consists of correspondence and realia connected to William Ingram and his service in the 12th Connecticut Volunteer Infantry during the Civil War. The correspondence includes 16 letters from William to his wife Harriet Lamphere Ingram, one letter to a correspondent addressed as "Friend William," a letter from his son William to Harriet Ingram, and a letter from Ingram's brother-in-law Henry Lamphere. Among the realia are tintypes of Ingram in uniform and in civilian clothes and a tintype of his son Frank and daughter Lydia, a powder flask, and insignia from his uniform.The William Ingram Collection was donated to Connecticut College in 2015 by June Ingram, great-grandaughter of William and assistant in the Greer Music Library.