The collection consists of correspondence, manuscripts, printed materials and photographs. The correspondence includes letters from Mikhail T. Florinskiĭ, Henry S. Haskell, James T. Shotwell, and Arthur Hays Sulzberger, mostly concerning the preparation and publication of Geshkoff's doctoral dissertation, entitled "The Balkan Union." There is also correspondence with Bulgarian-American journalists. Manuscripts, which comprise the bulk of the collection, include Geshkoff's Master's thesis, entitled "The Constitiution of Bulgaria," and several works, in varying states of completion, on the Balkans and Balkan affairs.