According to Hose, the Kenyahs and Kayans migrated into Sarawak from Dutch Borneo several hundred years ago, and he has previously published his opinion that the Kenyahs migrated into the Baram River some hundred years or so before the Kayans; they were the only people able to resist the constant raids made by the blustering and warlike Kayans, who almost exterminated the smaller tribes, and made slaves of the weaker ones. Naturally the Kayans occupied the best tracts of lands which lay in the undulating hills between the swampy low country and the mountains at the head waters of the rivers. They also confiscated all the caves of the esculent swifts, selling their nests to the traders whenever a Brunei Malay or Chinaman dared to venture up-river amongst them. Kayans often travelled as far as Brunei in their long boats, and some few even ventured as far as Singapore to sell the produce of these caves, taking passage in Chinese junks from Labuan.

All the tribes, except the Punans and Ukits, are agriculturists; they clear the jungle off the low hills that flank the tributaries of the large rivers, but always leave a few scattered trees standing; irrigation is attempted by the Kalabits only, as the padi (rice) is grown like any other cereal on dry ground; swamp padi is also grown in the lowland. In their gardens they grow yams, pumpkins, sugar cane, bananas, and sometimes coconuts and other produce. They hunt all land animals that serve as food, and fish, usually with nets, in the rivers, or spear the fish that have been stupefied with tuba; river prawns are also a favourite article of diet.

They all live in long communal houses, which are situated on the banks of the rivers. I have already described this type of dwelling, but although the different tribes have their own peculiar modifications, the same general plan is adhered to.

The social organisation is correspondingly higher than among Punans. Amongst the small Kalamantan tribes the headman has not much influence, unless he be a man of exceptional power and energy, but among the larger tribes, and especially among the Kayans and Kenyahs, the headmen are real chiefs, and exercise an undisputed sway. In some cases a pre-eminent man will be acknowledged as the head chief of a considerable district.

Of all these tribes the Kenyahs are perhaps the highest in social evolution. By their superior solidarity and their undoubted intelligence they were able to hold their own against the turbulent Kayans. They are the most expert boatmen of the Baram district, and, what is very significant, the women are less shy than is the case among other tribes. Indeed, some of the girls and young women—for example, those in Tama Bulan’s house—are particularly friendly and lively, but always behave in a really ladylike way.

All these agricultural tribes are artistic, but in varying degrees. They are all musical people, and sing delightful chorus songs. Many of their utensils are decorated with no mean skill. In some tribes the ends of the beams of the houses are carved to represent various animals; in some the verandah is decorated with boldly carved planks, or with painted boards and doors. The bamboo receptacles are often carved in low relief in very effective patterns, and the bone handles of the parangs are always carved in an intricate manner. Lastly, the minor utensils of daily life are often decorated in a way that reveals the true artistic spirit, such, for example, as the plaited patterns on the rice baskets and winnowing trays. Nor must the neat and effective bead-work be overlooked.

The Kenyahs and Kayans smelt iron and make spear heads and sword (parang) blades; the former are especially noted for their good steel. The forge with two bellows is the usual form that is widely spread in Malaysia.

The Iban, or Sea Dayaks, formerly occupied only the Saribas, Batang, Lupar, and Kaluka rivers and their tributaries, and they still remain there; but as the Kayans and other tribes on the Lower Rejang have retreated more into the interior, this river, for a considerable portion of its course, is also now populated by Iban, who have migrated at various times from the above-mentioned rivers. As the country became more settled these truculent people have rapidly increased, and now occupy most of the best farming lands.

In more recent years migrations of the Iban have taken place to the head of the Muka River, the Tatau, and lastly into the Baram, but in all cases with the sanction of the Government. Before the establishment of the present Government the Iban were unable to obtain a footing on the Baram River, as they were afraid of the Kayans and Kenyahs. They are also found in the head waters of many of the Kapuas tributaries on the watershed between Sarawak and Dutch Borneo.

The Iban is short (average stature 5 feet 2½ inches) and has a broad head (average cephalic index 83). The colour of the skin of the men is, on the whole, darker than among the inland tribes. They have the same long, slightly wavy, black hair, showing a reddish tinge in certain lights that is characteristic of the Borneans generally. They are an active little people.