The Matampay River is a dead stream which joins the Pulangi at Cotabato. Tagiman is the name of an old settlement built on the Matampay River some distance above Cotabato. It is now called Binilwan. Matampay and Lusudun were built on the Matampay River east of Cotabato. Katitwan is an old settlement on the right bank of the river 3 miles below Libungan. Libungan is built at the junction of a river of the same name with the Pulangi, about 9 miles above Cotabato. The point at the fork is called Tambao. Three miles below Tambao on the right bank of the south branch is the site of Bagumbayan. Three miles below Bagumbayan on the left bank of the river is Taviran or Tapidan. Ten miles below Taviran comes Tamontaka, which is nearly south of Cotabato and about 4 miles distant. Tamontaka is about 4 miles from the mouth of the south branch of the Pulangi. Lumbayanági lies a little below Tamontaka, on the right bank of the river. Immediately above the fork and on the left bank of the main river lies the old site of Kabuntalan. Fourteen miles above the fork lies Dulawan, the settlement at present occupied by Datu Piang. Here empties one of the largest tributaries of the Pulangi, which is navigable by launches for 12 miles farther up, to Sapakan, Datu Utu's main residence. Rakungan lies in the foothills of the Tiruray Mountains about 12 miles south of Sapakan. Talayan lies in the foothills of the Tiruray Mountains 15 miles southwest of Dulawan. Two miles below Dulawan lies the old site of Bwayan, on the left bank of the Pulangi. Opposite Bwayan and Dulawan lies the land of Kudarangan. Tinunkup is Reina Regente and Kabarukan is the wooded hill beyond. Sarunayan is the stretch of country lying north of Reina Regente and northeast of Kudarangan and extending to the base of the Kulingtan Mountains, which separate the Rio Grande Valley from the Ranao region. The country occupying the declivities of these mountains north of Sarunayan is called Pidatan. Bagu Ingud is an old settlement that lies along the left bank of the river about 16 or 20 miles above Reina Regente. Matbangan is on the right bank of the river and extends a short distance below Piket. The Malitigaw or Malidigaw is a large tributary of the Pulangi, about 15 miles above Piket. Matinggawan is located at the junction of the Kabakan tributary and about 30 miles above Piket. It is the chief settlement of the last Moro district in the Rio Grande Valley whose farthest boundary is the Mulita stream, which is about 115 miles by river above Cotabato.