This work presents the Arabic texts and annotated translations of 30 documents exchanged between 'Ali Dinar, Sultan of Darfur, in the Sudan from 1898 to 1916. Through these fortuitously surviving pieces of diplomatic correspondence, the authors throw valuable new light on the foreign policy of 'Ali Dinar, the long-distance trade in arms and other "luxury" goods between Darfur and the Sanusiyya, and the policy of the Sanusiyya toward Darfur and the surrounding region. The authors have provided an extended interpretive essay, organized chronologically, placing the documents themselves and the information they contain in a wider context. This book contributes to the growing literature of documentary source materials from northeastern Africa.