There are seven omen birds, according to the Penihings, and they are regarded as messengers sent by a good antoh to warn of danger. For the same purpose he make a serpent pass in front of the prahu, or a rusa cry in the middle of the day. At night this cry is immaterial. The most inauspicious of all omens is the appearance of a centipede. If a man in a ladang is confronted with such an animal he at once stops work there and takes up a new field. 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.