A detachment of Spanish troops occupied the town in 1882 and built a stone fort and barracks. American troops were there from 1900 to 1904, when they were relieved by a detachment of the Philippine Constabulary. An effort was made in 1899 by the present sultan, Jamalul Kiram II, to retain Siasi under his own jurisdiction for the establishment of a custom-house where he could collect duties on foreign goods, as was formerly done by his father; but no such rights were conceded to him. Siasi is a closed port at present. The residents of the town are Samals and Chinese traders. They vary from 500 to 700 in number. The other settlements on the island are, on the north, Siyundu, Pagatpat, and Manta; on the east, Pamungunan, Tanjun, Sipanding, and Bulikulul; on the south, Dugu, Latung, and Musu; on the west, Nipanipa, Jambanganan, Dungus, and Sablay; in the interior, Kabubu, Ju, and Kungatad. Siasi and Laminusa are important centers of pearl and shell fishing. About 2,000 Samals live on Laminusa.
Pandami is an attractive island. Its long diameter runs north and south. Two round peaks, one at each end of the island, give it the shape of a saddle and make a picturesque sight from the sea. The people are chiefly Samals ruled by Sulu datus. Its best settlements are on the west and south. The name given to this island on Spanish maps is Lapak, which is the name of one of its southern settlements. The northern extremity of the island is Diadia Point, the northeast projection is Butun Point. The chief settlements on the west are, beginning at the north, Subasuba, Tabunan, Pari’an Pandami, Tubig-shina, Lahi, and Sibawud, which lies on a reef off the southern point of the island. On the east lie Ambilan, Bakal, and Lapak. Laminusa and Kabinga’an lie to the east of Siasi. They are small but thickly populated by Samals. The chief settlements of Laminusa are Tampan on the north and Kungkung on the south.
The Tawi-tawi Group lies to the south and west of the Tapul Group and extends as far west as the Sibutu Passage. This is the largest group in number and area, including eighty-eight islands with a combined area of 462 square miles. Its population is estimated at 25,000. These islands form two distinct divisions or subgroups, differing in both extent and population.
The first or northern division includes Bangao, Sangasanga, Tawi-tawi, Tandu-batu, and a large number of smaller islands, all of which are rough, volcanic, mountainous, and very sparsely populated. The second or southern division is a series of low, flat islands which are smaller in area but more thickly populated than those of the northern division. The principal names, beginning at the east, are the following: Kinapusan, Bintulan, Tabawan, South Ubian, Tandubas, Sikubun, Lata’an, Mantabwan, Banaran, Bilatan, Manuk-manka, and Simunul. Extensive reefs and narrow channels and shoals separate these islands from one another and from those of the northern division, rendering navigation between them impossible except in vessels of very light draft.
Bangao, Sanga-sanga, and Tawi-tawi are separated by very narrow channels and are practically one island. Bangao forms the southwest extremity and is substantially one solid rock which rises perpendicularly to a height of 228 meters. It is a conspicuous landmark to vessels going through the Sibutu Passage. The town of Bangao is a military station and an open port; it has an excellent landlocked harbor and a very poor water supply. The town has been occupied by troops since 1882, but it has never attained any size or importance.
Tawi-tawi Island is a continuous range of hills covered by thick and rich forests. The highest points in the range are the Dromedary peaks (591 meters) lying about the center of the island. The length of the island is about 34 miles and its greatest width 14 miles. It is next in size to the Island of Sulu, but it is very sparsely populated. Its chief settlements are Tungpatung, Balimbang, Lissum, and Bu’an on the south coast, and Tawi-tawi, Tata’an, Butung, Tumhubung, Tumbaga’an, Languyan, and Bas on the north. At Balimbang are built the best types of Sulu and Samal boats. Good timber abounds in the neighboring hills, and the little bay is transformed into a shipyard. The town used to be a famous rendezvous for Samal pirates. Tata’an had formerly a Spanish garrison; the present Moro town is a little distance to the south of the ruins of the fort and is called Butung. It is built on the hillside and commands a pretty view of the sea. It lies 100 miles east of Lahat Datu, East Borneo. The anchorage is deep and safe, being well protected by a large semicircle of reefs. A boa 30 feet long was killed on the island in 1903. Rubber and gutta-percha are found on this island. Tapioca and ubi are the staple products.
Sibutu lies in a little group of the same name, situated between the Tawi-tawi Group and Borneo and at a distance of about 15 miles from each. The Sibutu Passage separates it from Manuk-manka, the southernmost island of the Tawi-tawi Group, and the Alice Channel from Borneo. This island did not lie within the limits of the Philippine Islands as defined in the Treaty of Peace of December 10, 1898. It was ceded by Spain with Kagayan Sulu, by a separate treaty in November, 1900. Its close proximity to Borneo renders it a convenient stopping place for small Moro boats navigating between Borneo and Sulu. Sitanki, an island and town, is the trade center of this group, and has just lately been made an open port.