Diaries, scrapbooks, newspaper clippings, oral history interviews, correspondence, photos, and other materials relating to the passengers, mainly American missionaries, who were aboard the ship Zamzam, sunk in the south Atlantic Ocean in 1941 by a German warship. Materials describe the sinking, the subsequent experiences of the passengers as German prisoners and the internment of some for the duration of the war, and reunions held in later years by the survivors and their families.