Nothing reveals the true character of a nation, its capabilities, tendencies, and resources, better than its history. There is no time when such general intimate knowledge of a people is more interesting and more needed than during the period of their regeneration, and there can be no time when the history of the Sulus will be more interesting than at present. Besides the Moro sources above referred to, several authors in Spanish and English have been consulted and quoted with due credit. Special indebtedness must however be expressed to Col. Miguel S. Espina, author of "Apuntes sobre Jolo," whose admirable work has been our chief authority for the majority of the events which occurred after the Spanish invasion of Sulu in 1578. Espina saw considerable service in Sulu, was intimately acquainted with the Spanish administration of Sulu affairs, and most of his information was derived from official documents and other sources of equal authenticity. Most of the events relating to the late period of Spanish occupation of Sulu have been confirmed by personal investigation, and the Sulu view of every matter of significance has been studied and understood. A chapter on the geography of the Archipelago is presented first to give a general idea of the geographical relations of the Archipelago of Sulu, the location of its various islands and settlements, and its commercial resources. Special attention has been given to accurate spelling of names and the correct location of settlements and small islands. Unusual pains have been taken to get satisfactory maps of the Archipelago and Island of Sulu and sketches of the town of Jolo. These will help the reader and add interest to the succeeding chapters. In the Appendixes will be seen reprints of various documents, reports, quotations and letters of direct and significant bearing on the history of Sulu and Mindanao. They are arranged in chronological order and are intended to complete the record and description of important events in Moro history so as to throw light on the actual conditions of life among the Moros, the political motives of the interested powers, and the real state of affairs in Mindanao at the time of the Spanish evacuation. The source from which each article is derived is given in connection therewith. A considerable number of quotations or chapters have been taken from "The Philippine Islands," by Blair and Robertson, for which special obligation is hereby expressed. Many of the official documents given could not be conveniently incorporated in the text of the history proper, and are herein published, probably for the first time. They include protocols, capitulations, official letters, decrees, and correspondence relative to Sulu obtained from the Division of Archives of the Philippine Islands. The originals of the copies can be seen in Spain in the Indies Archives.