Joseph Kingsbury Greene was an American Board of Commissioners for Foreign Missions Congregational missionary in Turkey for fifty-one years, stationed in Nicodemia, Bursa, and Manisa. He was fluent in Armenian and Turkish languages. The collection contains Greene's diaries from 1859 through 1917, Greene's correspondence with members of the American Board of Commissioners for Foreign Missions and others, and Greene's handwritten English and Armenian dictionaries.