This volume presents the correspondence that took place between the Goettingen Iranian scholar and academician Friedrich Carl Andreas (1846-1930) and the Turkish, Ural-Altaic, and English scholar Willi Bang(-Kaup) (1869-1934), who worked in Leuven until 1914. The editors have included a multi-chapter introduction to the annotated correspondence, which sets the letters against the backdrop of contemporary relationships among the international community of Orientalist scholars. The introduction includes an assessment of the importance of W. Bang(-Kaup) and Goettingen for the field of Cumanian studies.