According to the Penihing chief in Long Kai the name Penyahbong was applied formerly not only to the people, but also to the mountain range in which they were living, the Müller mountains, around the headwaters of the Kapuas River in the Western Division. The western sides of the Müller mountains seem to have been their headquarters, and most of them still live west of the mountains. To one of the tributaries of this river the tribe owes the name by which they are known among Punans, Saputans, and Bukats, who call the Penyahbongs simply Kreho. They are not numerous and so far as my information goes they are limited to a few hundred. Gompul, the most reliable of my Malays in that region, and one of the first to arrive in those parts, told me that his mother had been captured by the Penyahbongs and kept by them for thirty-five years, until her death. According to his estimate there were over two hundred of them in the Müller mountains, and they had killed many Malays, taking their heads. Three chiefs were famous for being very tall. Fishing with tuba is known to them, also to the nomadic Punans and Bukats, Saputans, and Penihings. The Penyahbongs believe they were placed in this world by an antoh. Omens are taken from nine birds and from dreams. When a house is finished there are two or three hours' dancing in the night by men and women, one man playing the sapi (native guitar). The child is born outside of the house. One or two women stand by to take it, wrapped in cloth, into the dwelling, where for three days it remains unbathed. Although death at childbirth is known to occur, usually within fifteen minutes the mother rises and repairs to the house. The umbilical cord is cut with a sharp bamboo and the afterbirth is not taken care of, dogs generally being permitted to eat it. When the child can walk the father and mother give it a name. No abortion is practised, there are no puberty ceremonies, and sexual intercourse is not practised during menstruation. SAPUTANS (Notes from the Kasao River, a tributary to the Upper Mahakam) The name Saputan is derived from the word sahput, sumpitan (the blow-pipe), and probably means, "those who have sumpitan." In the upper part of the Kasao River is a big back current called Saputan and the people who originally lived at the headwaters have the same name as the current. At first they were roaming in the mountains, though not conflicting with the Penyahbongs, and later settled in four kampongs which, beginning with the uppermost, at the time of my visit were: 1. Pomosing (mouse) at a tributary of the same name. 2. Data Láong (land of durian). 3. Ong Sangi (ong = river). 4. Nomorunge (a common, small, black and white bird) on a tributary of the same name; with hardly a hundred full-grown persons, this is the largest. Formerly the office of the chief, tjúpi, was hereditary. When he became old he was succeeded by his son.