The tribal name of the Penihings is A-o-haeng. Until recently each kampong had from two to five súpi, chiefs or rajas, one being superior to the others. The office was hereditary. There are still several rajas in one kampong, for instance, three in Long Tjehan. The Penihings have a practical turn of mind and though they usually tell the truth at times they may steal. They are the best workers among the tribes on the Mahakam River (above the great rapids) and on a journey they travel in their prahus day and night, resting only a couple of hours in the early morning. However, the custom of travelling at night may be due to fear of meeting omen birds.

The hair of the Penihings and the Oma-Sulings, though it looks black, in reality is brown with a slight reddish tint plainly visible when sunlight falls through it. I believe the same is the case with other Dayak tribes. In Long Tjehan I observed two natives who, though passing as Penihings, were of decidedly different type, being much darker in colour and of powerful build, one having curly hair while that of the other was straight. Penihing women have unpleasantly shrill voices, a characteristic less pronounced with the men. Members of this tribe are not so fine-looking as those of other tribes on the Mahakam, with the exception of the Saputans.

When leaving the kampong on his daily trips to the ladang, or when he travels, the Penihing carries his shield. Even when pig-hunting, if intending to stay out overnight, he takes this armour, leaving it however at his camping-place. A spear is also carried, especially on trips to the ladang. The sumpitan, called sawput, is no longer made and the tribe is not very apt at its use; therefore, being unable to kill the great hornbill themselves, these natives have to buy its highly valued tail feathers from the Punans. The latter and the Bukats, who are the greater experts in the use of the sumpitan, notwithstanding their limited facilities, are also the better makers, which is by no means a small accomplishment. These nomads, and to some extent the Saputans as well, furnish this weapon to all the Bahau tribes, the Kayans excepted.

When meeting, no salutations are made. The mother uses for her babe the same cradle in which she herself was carried on her mother's back. It is of the usual Dayak pattern, and when it becomes worn or broken a new one is provided, but the old one remains hanging in the house. A cradle is never parted with, because of the belief that the child's life would thereby be imperilled. Should the little one die, the cradle is thrown into the river. An unmarried man must not eat rusa nor fowls, and a married man is prohibited from doing so until his wife has had three children. Men should not touch with their hands the loom, nor the ribbon which is passed round the back of the woman when she weaves, nor should a woman's skirt be touched by a man. These precautions are taken to avoid bad luck in fishing and hunting, because the eyesight is believed to be adversely affected by such contact. Their sacred number is four.

An unusual game played with large tops is much practised for the purpose of taking omens in the season when the jungle is cleared in order to make new ladangs. The top (bae-ang) is very heavy and is thrown by a thin rope. One man sets his spinning by drawing the rope backward in the usual way; to do this is called niong. Another wishing to try his luck, by the aid of the heavy cord hurls his top at the one that is spinning, as we would throw a stone. To do this is called maw-pak, and hence the game gets its name, maw-pak bae-ang. If the second player hits the spinning top it is a good omen for cutting down the trees. If he fails, another tries his luck, and so on. The long-continued spinning of a top is also a favourable sign for the man who spins it. With the Katingans a hit means that it is advisable to cut the trees at once, while a miss necessitates a delay of three days. Every day, weather permitting, as soon as the men return from the ladangs in the evening, about an hour before sunset, this game is played on the space before the houses of the kampong. Sometimes only two men consult fate, spinning alternately. The same kind of top is found among the Kayans, Kenyahs, and other Dayak tribes.

According to the information I obtained from the Dayaks they believe that the soul has eternal existence, and although many tribes have the idea that during life several souls reside in one individual, after death only one is recognised, which is generally called liao. One or more souls may temporarily leave the body, thereby causing illness.

Neither in this life nor the next are there virtuous or sinful souls, the only distinction being in regard to social standing and earthly possessions, and those who were well-to-do here are equally so there. With the Katingans whatever is essential to life in this world is also found in the next, as houses, men, women, children, dogs, pigs, fowls, water-buffaloes, and birds. People are stronger there than here and cannot die. The principal clothing of the liao is the tatu marks, which it will always keep. The garments worn besides are new and of good quality. When my informant, a native official of Kasungan, who sports semi-civilised dress, expressed his disapproval of the poor wearing quality of his trousers to an old Katingan, the latter exclaimed: "That matters not. Above, all new ones!" In the belief of the Duhoi (Ot-Danums) the liao remains with the body until the funeral-house falls into decay, perhaps for twenty years, when it enters the soil and "is then poor." The idea of the Penihings about life after death is vague, and they do not pretend to know where the soul goes.

The Penihings acknowledge five souls, or batu, in each individual: one above each eye, one at either side of the chest below the arm, and one at the solar plexus. The souls above the eyes are able to leave their abiding-place, but the others can go only short distances. If the first-named depart the person becomes ill next day, the immediate cause being that a malevolent antoh, desiring to eat the victim, has entered the head through the top. On perceiving this the two souls located above the eyes escape and the blian is called upon to bring them back, for unless they return the afflicted one will die.

A fowl or a pig, or both, may then be killed and the blood collected. Some of it is smeared on the patient's forehead, head, and chest, the remainder being offered to antoh, both in plain form and mixed with uncooked rice, as has been described in Chapter XIX. When a fowl is sacrificed the empty skin, suspended from a bamboo stalk, is likewise reserved for antoh, the meat having been consumed, as usual, by those concerned.

As another effective means of inducing the return of the soul the blian sings for several hours during one night or more. In the Penihing tribe he accompanies himself by beating an especially made stringed shield. It is believed that the singer is able to see how the antoh caused the sickness: whether he did it by throwing a spear, by striking with a stick, or by using a sumpitan. In his efforts to restore the patient the blian is told what to sing by a good antoh that enters his head. Without such help no person can sing properly, and the object of the song is to prevail upon a beneficent spirit to eject or kill the evil one so that the souls may return.