Ratkan, the datu of Isikun, begot Dimalawang and Marang. Dimalawang begot Arani. Arani begot Antaw, Sayu, and Arawa. Arawa married Bayu and begot Baya. MANUSCRIPT NO. IV HISTORY OF THE DUMATUS AND THE CONVERSION OF MINDANAO TO ISLAM INTRODUCTION This manuscript is a correct copy of the original which is in the possession of Datu Kali Adam of Kalangnan, one of the principal present representatives of the dumatus. The dumatus are a distinct class of the Moros of Magindanao who trace their origin back to the former chiefs of the country who reigned before the introduction of Mohammedanism. The original was written by Datu Kali Adam himself, copied from a previous manuscript handed down to him from his father, who was a prominent judge, with some later additions of his own. It was neither neat nor well kept. It abounds with grammatical mistakes and has several errors in the text. Its style is mixed; Ranao words, pronouns, and terminations occur; still, in general it is a fair specimen of the literature of the Magindanao dialect. It is the best authority on its subject, and is greatly valued by the people. It is the oldest manuscript known on this subject. The ruler of Magindanao at the time of Kabungsuwan's arrival was Tabunaway. Tabunaway was not a datu; he was a timuway. The word timuway or timway means chief or leader, and is still generally used by the Tirurays and Manobos and other hill tribes. Kabungsuwan evidently conquered Magindanao, and its sovereignty passed over from Tabunaway to him, and to his descendants after him. The Moros greatly regard and respect every Mohammedan who is related to the Prophet, and look upon every Arabian as of noble birth and equal in rank to their datu class. Descent from Kabungsuwan constitutes all their claim to nobility and their right to the datuship. The descendants of Tabunaway are naturally jealous. They claim to have come from an Arabian ancestor who is descended from the Prophet, and take great pride in the fact. They assert that the datus omitted this part of the history from their books intentionally in order to give more importance to Kabungsuwan and to their own descent.