The peat-swamp lowlands of the south coast of Borneo between Kotawaringin and the Kapuas-Murung: a line of river mouths (Seruyan, Mentaya or Sampit, Katingan, Kahayan, Kapuas), each the outlet of its own interior.
The river peoples are later known as Ngaju, Sampit and Bakumpai; the sultanate of Kotawaringin is of the seventeenth century and is not shown. Javanese and Malay boats work this coast along the Java Sea; the port headmen of the mouths have their own record.
Who holds it
- Title
- No overall chief: village or longhouse headmen, elders and war leaders, each answering for their own people
- Since
- not pinned
- Born
- not known
- Family
- not known
- Confidence
- low
Nothing is written about the rulers or headmen of this country for 1200. The structure is read from geography and from ethnography of the nineteenth and twentieth centuries.
What it holds
- River villages in the peat swamps
- The river mouths on the Java Sea
- Forest goods in transit
Allies and rivals
The Sampit port headmen (South-coast river heads); the Barito mouth lies to the east.
How things stand that morning
Not described for 1200; the villages are presumed to be farming, fishing and selling what the rivers and forests give.
Wealth
Rattan, resin, gaharu, wax, gold in transit; no figures.
Military
Not known; boats, spears, shields and blowpipes in the later record. No numbers.
Threats
- Feuds and raiding between villages
- Flood, drought or fire
- A change in the trade that comes by sea
Places of note
- Kumai: Kotawaringin-side river mouth.
- Sampit: Mentaya river mouth.
- Kasongan: Katingan river town (a later name).
- Palangka Raya: Kahayan town (a modern city).
- Kuala Kapuas: Kapuas-Murung river mouth.
Where the sources disagree
- The ethnic names used here (Dayak, Kayan, Kenyah, Iban, Ngaju, Banjar and the rest) are later outsiders' or ethnographic names; the ethnic map of 1200 is not known and differs from the modern one.
Evidence: Geography and later ethnography only; no text of the period describes this country.
On the map: A rough outline of the people's country; the real extent of any village group in 1200 is not known, and nothing here is a border.
Sources and studies
- Background knowledge of Southeast Asian history (Wolters; Hall; Bellwood; Scott; Junker; Reid), recalled and not re-read in this pass
- The OMNIA board (September 2026) note for this place: a lead only, not a source
- The isa regional brief (ISA_BRIEF.md) and assignment ise.txt
Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.