This series contains correspondence and organizational records related to the Bureau of Missions. Correspondence primarily includes letters of Edwin Bliss and his successor Dr. Henry Otis Dwight, as they write to missionaries and missionary organizations around the world to garner interest in the newly formed organization, sell Bureau-produced materials, and acquire information and documents for the museum and library. There are also a few letters from Bureau President Alexander Maitland. Organizational records include extensive bylaws, meeting minutes, publications, newspaper articles, and charters.