The men and women of the Foreign Board of Missions served a variety of tribes. Their letters, intended to be reports from the field, are far more than dry discussions of mission business. Ranging in length from single fragments to reports of over twenty pages, they describe the Indian peoples and cultures, tribal factionalism, relations with the U.S. government, and the many problems and achievements of the work. The letters often become personal and even anguished, as the writers disclose their fears, worries, and hopes.